IP.CC
Search
IP address details
AS38029
Citibank N.A. - ISP Peering, Chennai, India ·
IP address details
AS38029
Citibank N.A. - ISP Peering, Chennai, India ·
  • Summary IP.CC
  • Prefixes
  • Peers
  • Upstream
  • Downstream
  • Graphs
  • World Map
  • WHOIS Details
  • IX

Summary

  • As Number
    AS38029
  • Org Name
    Citibank N.A. - ISP Peering, Chennai, India
  • Country
    India
  • Country Code
    IN
  • Website
  • Regional Registry
    APNIC
  • Allocated Date
    23rd May 2006
  • Allocated Status
    Allocated
  • Ipv4 Prefixes
    6
  • Ipv6 Prefixes
    0
  • Ipv4 Peers
    4
  • Ipv6 Peers
    0
  • Ipv4 Upstreams
    4
  • Ipv6 Upstreams
    0

Prefixes

There are 6 IPv4 Prefixes for this ASN.

Country
Announced Prefix
Description
Parent Prefix
RIR
India103.96.30.0/24
Citibank N.A., India
103.96.30.0/23APNIC
India103.96.31.0/24
Citibank N.A., India
103.96.30.0/23APNIC
United States192.193.106.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.107.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.245.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.246.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
  • 1
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology

Peers

There are 4 IPv4 Peers for this ASN.

Country
ASN
Description
IPv6
Russian FederationAS2854
LLC Orange Business Services
true
Russian FederationAS3216
PJSC "Vimpelcom"
true
IndiaAS4755
TATA Communications formerly VSNL is Leading ISP
true
IndiaAS9498
BHARTI Airtel Ltd.
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Upstream

There are 4 IPv4 Upstreams for this ASN.

Country
ASN
Description
IPv6
Russian FederationAS2854
LLC Orange Business Services
true
Russian FederationAS3216
PJSC "Vimpelcom"
true
IndiaAS4755
TATA Communications formerly VSNL is Leading ISP
true
IndiaAS9498
BHARTI Airtel Ltd.
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Downstream

There are 0 IPv4 Downstreams for this ASN.

Country
ASN
Description
IPv6
暂无数据
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Graphs

AS38029 Combined Upstream Graph AS38029 AS38029 AS2854 AS2854 AS38029->AS2854 AS3216 AS3216 AS38029->AS3216 AS4755 AS4755 AS38029->AS4755 AS9498 AS9498 AS38029->AS9498 AS1299 AS1299 AS2854->AS1299 AS20764 AS20764 AS2854->AS20764 AS3356 AS3356 AS3216->AS3356 AS6453 AS6453 AS4755->AS6453 AS9498->AS1299 AS2914 AS2914 AS9498->AS2914 AS3491 AS3491 AS9498->AS3491 AS6461 AS6461 AS9498->AS6461 AS7473 AS7473 AS9498->AS7473 AS3257 AS3257 AS1299->AS3257 AS7018 AS7018 AS1299->AS7018 AS1299->AS2914 AS1239 AS1239 AS1299->AS1239 AS1299->AS3356 AS174 AS174 AS20764->AS174 AS3356->AS3257 AS3356->AS1239 AS209 AS209 AS3356->AS209 AS3549 AS3549 AS3356->AS3549 AS6453->AS3356 AS3491->AS7018 AS7473->AS6461
AS38029 Combined Upstream Graph AS38029 AS38029 AS2854 AS2854 AS38029->AS2854 AS3216 AS3216 AS38029->AS3216 AS4755 AS4755 AS38029->AS4755 AS9498 AS9498 AS38029->AS9498 AS1299 AS1299 AS2854->AS1299 AS20764 AS20764 AS2854->AS20764 AS3356 AS3356 AS3216->AS3356 AS6453 AS6453 AS4755->AS6453 AS9498->AS1299 AS2914 AS2914 AS9498->AS2914 AS3491 AS3491 AS9498->AS3491 AS6461 AS6461 AS9498->AS6461 AS7473 AS7473 AS9498->AS7473 AS3257 AS3257 AS1299->AS3257 AS7018 AS7018 AS1299->AS7018 AS1299->AS2914 AS1239 AS1239 AS1299->AS1239 AS1299->AS3356 AS174 AS174 AS20764->AS174 AS3356->AS3257 AS3356->AS1239 AS209 AS209 AS3356->AS209 AS3549 AS3549 AS3356->AS3549 AS6453->AS3356 AS3491->AS7018 AS7473->AS6461

World Map

WHOIS Details

% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS38029'

% Abuse contact for 'AS38029' is '[email protected]'

aut-num: AS38029
as-name: CITI-IN-ISP_PEER
descr: Citibank N.A. - ISP Peering, Chennai, India
country: IN
import: from AS4755 action pref=100;accept ANY
import: from AS9498 action pref=100;accept ANY
export: to AS4755 announce AS38029
export: to AS9498 announce AS38029
default: to AS4755 action pref=10; networks ANY
default: to AS9498 action pref=100; networks ANY
org: ORG-CN7-AP
admin-c: JS1095-AP
tech-c: JS1095-AP
abuse-c: AC2318-AP
notify: [email protected]
mnt-lower: MAINT-IN-CITI
mnt-routes: MAINT-IN-CITI
mnt-by: APNIC-HM
mnt-irt: IRT-CITIBANKINDIA-NON-IN
last-modified: 2021-01-12T22:46:26Z
source: APNIC

irt: IRT-CITIBANKINDIA-NON-IN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
auth: # Filtered
remarks: [email protected] is invalid
mnt-by: MAINT-IN-CITI
last-modified: 2023-07-19T13:08:50Z
source: APNIC

organisation: ORG-CN7-AP
org-name: CITI BANK N.A.,
org-type: LIR
country: IN
address: 163, Anna Salai
phone: +91-22-4234-3535
e-mail: [email protected]
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-09-05T02:15:09Z
source: APNIC

role: ABUSE CITIBANKINDIANONIN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
country: ZZ
phone: +000000000
e-mail: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
nic-hdl: AC2318-AP
remarks: Generated from irt object IRT-CITIBANKINDIA-NON-IN
remarks: [email protected] is invalid
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2023-07-19T13:09:44Z
source: APNIC

person: John SG
nic-hdl: JS1095-AP
e-mail: [email protected]
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
phone: +91 44 4222 6413
fax-no: +91 44 4215 9492
country: IN
mnt-by: MAINT-NEW
last-modified: 2008-09-04T07:36:20Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-US4)


% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS38029'

% Abuse contact for 'AS38029' is '[email protected]'

aut-num: AS38029
as-name: CITI-IN-ISP_PEER
descr: Citibank N.A. - ISP Peering, Chennai, India
country: IN
import: from AS4755 action pref=100;accept ANY
import: from AS9498 action pref=100;accept ANY
export: to AS4755 announce AS38029
export: to AS9498 announce AS38029
default: to AS4755 action pref=10; networks ANY
default: to AS9498 action pref=100; networks ANY
org: ORG-CN7-AP
admin-c: JS1095-AP
tech-c: JS1095-AP
abuse-c: AC2318-AP
notify: [email protected]
mnt-lower: MAINT-IN-CITI
mnt-routes: MAINT-IN-CITI
mnt-by: APNIC-HM
mnt-irt: IRT-CITIBANKINDIA-NON-IN
last-modified: 2021-01-12T22:46:26Z
source: APNIC

irt: IRT-CITIBANKINDIA-NON-IN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
auth: # Filtered
remarks: [email protected] is invalid
mnt-by: MAINT-IN-CITI
last-modified: 2023-07-19T13:08:50Z
source: APNIC

organisation: ORG-CN7-AP
org-name: CITI BANK N.A.,
org-type: LIR
country: IN
address: 163, Anna Salai
phone: +91-22-4234-3535
e-mail: [email protected]
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-09-05T02:15:09Z
source: APNIC

role: ABUSE CITIBANKINDIANONIN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
country: ZZ
phone: +000000000
e-mail: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
nic-hdl: AC2318-AP
remarks: Generated from irt object IRT-CITIBANKINDIA-NON-IN
remarks: [email protected] is invalid
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2023-07-19T13:09:44Z
source: APNIC

person: John SG
nic-hdl: JS1095-AP
e-mail: [email protected]
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
phone: +91 44 4222 6413
fax-no: +91 44 4215 9492
country: IN
mnt-by: MAINT-NEW
last-modified: 2008-09-04T07:36:20Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-US4)


IX

Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
IP.CC
Search
IP address details
AS38029
Citibank N.A. - ISP Peering, Chennai, India ·
IP address details
AS38029
Citibank N.A. - ISP Peering, Chennai, India ·

Summary

  • As Number
    AS38029
  • Org Name
    Citibank N.A. - ISP Peering, Chennai, India
  • Country
    India
  • Country Code
    IN
  • Website
  • Regional Registry
    APNIC
  • Allocated Date
    23rd May 2006
  • Allocated Status
    Allocated
  • Ipv4 Prefixes
    6
  • Ipv6 Prefixes
    0
  • Ipv4 Peers
    4
  • Ipv6 Peers
    0
  • Ipv4 Upstreams
    4
  • Ipv6 Upstreams
    0

Prefixes

There are 6 IPv4 Prefixes for this ASN.

Country
Announced Prefix
Description
Parent Prefix
RIR
India103.96.30.0/24
Citibank N.A., India
103.96.30.0/23APNIC
India103.96.31.0/24
Citibank N.A., India
103.96.30.0/23APNIC
United States192.193.106.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.107.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.245.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
United States192.193.246.0/24
Citicorp Global Information Network
192.193.0.0/16ARIN
  • 1
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology

Peers

There are 4 IPv4 Peers for this ASN.

Country
ASN
Description
IPv6
Russian FederationAS2854
LLC Orange Business Services
true
Russian FederationAS3216
PJSC "Vimpelcom"
true
IndiaAS4755
TATA Communications formerly VSNL is Leading ISP
true
IndiaAS9498
BHARTI Airtel Ltd.
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Upstream

There are 4 IPv4 Upstreams for this ASN.

Country
ASN
Description
IPv6
Russian FederationAS2854
LLC Orange Business Services
true
Russian FederationAS3216
PJSC "Vimpelcom"
true
IndiaAS4755
TATA Communications formerly VSNL is Leading ISP
true
IndiaAS9498
BHARTI Airtel Ltd.
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Downstream

There are 0 IPv4 Downstreams for this ASN.

Country
ASN
Description
IPv6
暂无数据
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity

Graphs

AS38029 Combined Upstream Graph AS38029 AS38029 AS2854 AS2854 AS38029->AS2854 AS3216 AS3216 AS38029->AS3216 AS4755 AS4755 AS38029->AS4755 AS9498 AS9498 AS38029->AS9498 AS1299 AS1299 AS2854->AS1299 AS20764 AS20764 AS2854->AS20764 AS3356 AS3356 AS3216->AS3356 AS6453 AS6453 AS4755->AS6453 AS9498->AS1299 AS2914 AS2914 AS9498->AS2914 AS3491 AS3491 AS9498->AS3491 AS6461 AS6461 AS9498->AS6461 AS7473 AS7473 AS9498->AS7473 AS3257 AS3257 AS1299->AS3257 AS7018 AS7018 AS1299->AS7018 AS1299->AS2914 AS1239 AS1239 AS1299->AS1239 AS1299->AS3356 AS174 AS174 AS20764->AS174 AS3356->AS3257 AS3356->AS1239 AS209 AS209 AS3356->AS209 AS3549 AS3549 AS3356->AS3549 AS6453->AS3356 AS3491->AS7018 AS7473->AS6461
AS38029 Combined Upstream Graph AS38029 AS38029 AS2854 AS2854 AS38029->AS2854 AS3216 AS3216 AS38029->AS3216 AS4755 AS4755 AS38029->AS4755 AS9498 AS9498 AS38029->AS9498 AS1299 AS1299 AS2854->AS1299 AS20764 AS20764 AS2854->AS20764 AS3356 AS3356 AS3216->AS3356 AS6453 AS6453 AS4755->AS6453 AS9498->AS1299 AS2914 AS2914 AS9498->AS2914 AS3491 AS3491 AS9498->AS3491 AS6461 AS6461 AS9498->AS6461 AS7473 AS7473 AS9498->AS7473 AS3257 AS3257 AS1299->AS3257 AS7018 AS7018 AS1299->AS7018 AS1299->AS2914 AS1239 AS1239 AS1299->AS1239 AS1299->AS3356 AS174 AS174 AS20764->AS174 AS3356->AS3257 AS3356->AS1239 AS209 AS209 AS3356->AS209 AS3549 AS3549 AS3356->AS3549 AS6453->AS3356 AS3491->AS7018 AS7473->AS6461

World Map

WHOIS Details

% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS38029'

% Abuse contact for 'AS38029' is '[email protected]'

aut-num: AS38029
as-name: CITI-IN-ISP_PEER
descr: Citibank N.A. - ISP Peering, Chennai, India
country: IN
import: from AS4755 action pref=100;accept ANY
import: from AS9498 action pref=100;accept ANY
export: to AS4755 announce AS38029
export: to AS9498 announce AS38029
default: to AS4755 action pref=10; networks ANY
default: to AS9498 action pref=100; networks ANY
org: ORG-CN7-AP
admin-c: JS1095-AP
tech-c: JS1095-AP
abuse-c: AC2318-AP
notify: [email protected]
mnt-lower: MAINT-IN-CITI
mnt-routes: MAINT-IN-CITI
mnt-by: APNIC-HM
mnt-irt: IRT-CITIBANKINDIA-NON-IN
last-modified: 2021-01-12T22:46:26Z
source: APNIC

irt: IRT-CITIBANKINDIA-NON-IN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
auth: # Filtered
remarks: [email protected] is invalid
mnt-by: MAINT-IN-CITI
last-modified: 2023-07-19T13:08:50Z
source: APNIC

organisation: ORG-CN7-AP
org-name: CITI BANK N.A.,
org-type: LIR
country: IN
address: 163, Anna Salai
phone: +91-22-4234-3535
e-mail: [email protected]
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-09-05T02:15:09Z
source: APNIC

role: ABUSE CITIBANKINDIANONIN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
country: ZZ
phone: +000000000
e-mail: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
nic-hdl: AC2318-AP
remarks: Generated from irt object IRT-CITIBANKINDIA-NON-IN
remarks: [email protected] is invalid
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2023-07-19T13:09:44Z
source: APNIC

person: John SG
nic-hdl: JS1095-AP
e-mail: [email protected]
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
phone: +91 44 4222 6413
fax-no: +91 44 4215 9492
country: IN
mnt-by: MAINT-NEW
last-modified: 2008-09-04T07:36:20Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-US4)


% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS38029'

% Abuse contact for 'AS38029' is '[email protected]'

aut-num: AS38029
as-name: CITI-IN-ISP_PEER
descr: Citibank N.A. - ISP Peering, Chennai, India
country: IN
import: from AS4755 action pref=100;accept ANY
import: from AS9498 action pref=100;accept ANY
export: to AS4755 announce AS38029
export: to AS9498 announce AS38029
default: to AS4755 action pref=10; networks ANY
default: to AS9498 action pref=100; networks ANY
org: ORG-CN7-AP
admin-c: JS1095-AP
tech-c: JS1095-AP
abuse-c: AC2318-AP
notify: [email protected]
mnt-lower: MAINT-IN-CITI
mnt-routes: MAINT-IN-CITI
mnt-by: APNIC-HM
mnt-irt: IRT-CITIBANKINDIA-NON-IN
last-modified: 2021-01-12T22:46:26Z
source: APNIC

irt: IRT-CITIBANKINDIA-NON-IN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
auth: # Filtered
remarks: [email protected] is invalid
mnt-by: MAINT-IN-CITI
last-modified: 2023-07-19T13:08:50Z
source: APNIC

organisation: ORG-CN7-AP
org-name: CITI BANK N.A.,
org-type: LIR
country: IN
address: 163, Anna Salai
phone: +91-22-4234-3535
e-mail: [email protected]
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-09-05T02:15:09Z
source: APNIC

role: ABUSE CITIBANKINDIANONIN
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
country: ZZ
phone: +000000000
e-mail: [email protected]
admin-c: JS1095-AP
tech-c: JS1095-AP
nic-hdl: AC2318-AP
remarks: Generated from irt object IRT-CITIBANKINDIA-NON-IN
remarks: [email protected] is invalid
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2023-07-19T13:09:44Z
source: APNIC

person: John SG
nic-hdl: JS1095-AP
e-mail: [email protected]
address: Citibank N.A.
address: 2 Club House Road
address: Chennai - 600002
address: India
phone: +91 44 4222 6413
fax-no: +91 44 4215 9492
country: IN
mnt-by: MAINT-NEW
last-modified: 2008-09-04T07:36:20Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-US4)


IX

Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
Related Networks
  • AS37942
    3rd Floor, Wenbo Building, No.A2 Gaoyuan Street,
  • AS38031
    OptiMax Communication Ltd.
  • AS38034
    CSLOXINFO
  • AS38037
    InternetNZ Lab
  • AS38040
    TOT Public Company Limited
  • AS38041
    Krish Revo
  • AS38051
    OpenWaveX LLC
  • AS38058
    AMDOCS DEVELOPMENT CENTRE INDIA LLP
What is an ASN?
Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
IP.CC

An API to build on security, web personalization, marketing, and more

For the financial services sector and FinTech companies, IP.CC is an invaluable tool. Our clients in the financial industry love what we do, and we're excited to show you why.
IP.CC

Our IP Tools

Explore all toolsIP.CC
  • IP.CCPing

    Ping is a free tool to help you find IP addresses that can be pinged using the ICMP protocol. You can either lookup up an IP address or a CIDR block.

    Try PingIP.CC
  • IP.CCDNS

    DNS is a technique used to determine the hostname associated with an IP address. This is done searching hostname registry and registrar tables for PTR records.

    Try DNSIP.CC
  • IP.CCPort

    Port is a free tool for detecting open ports on your device. It automatically detects IP-address and scans your device, identifying open and vulnerable ports through which hackers.

    Try PortIP.CC
Frequently Asked Question