203.187.128.0/19

AS3300 · British Telecommunications PLC

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Summary

Country	United States
Domain	bt.com
ASN	AS3300
Registry	APNIC
ID	INFONET-AP-02

WHOIS Details

inetnum:        203.187.128.0 - 203.187.159.255
netname:        INFONET-AP-02
descr:          BT-Infonet, Internet Service Provider
descr:          2160 E. Grand Ave. El Segundo, CA90245
country:        US
geoloc:         22.279845 114.171083
org:            ORG-ISC1-AP
admin-c:        MB29-Ap
tech-c:         MB29-AP
abuse-c:        AI330-AP
status:         ALLOCATED PORTABLE
remarks:        BT-Infonet in AP
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-AP-INFONET
mnt-routes:     MAINT-AP-INFONET
mnt-irt:        IRT-INFONET-AP
last-modified:  2020-10-20T00:57:38Z
source:         APNIC

irt:            IRT-INFONET-AP
address:        BT Global Services
e-mail:         matthias.blum@bt.com
abuse-mailbox:  abuse@eu.bt.net
admin-c:        MB29-AP
tech-c:         MB29-AP
auth:           # Filtered
remarks:        abuse@eu.bt.net was validated on 2025-06-06
remarks:        matthias.blum@bt.com was validated on 2025-06-25
mnt-by:         MAINT-AP-INFONET
last-modified:  2025-11-18T00:26:52Z
source:         APNIC

organisation:   ORG-ISC1-AP
org-name:       Infonet Services Corporation
org-type:       LIR
country:        US
address:        2160 East Grand Avenue
phone:          +44800-811-343
fax-no:         +44800-811-343
e-mail:         matthias.blum@bt.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:44Z
source:         APNIC

role:           ABUSE INFONETAP
country:        ZZ
address:        BT Global Services
phone:          +000000000
e-mail:         matthias.blum@bt.com
admin-c:        MB29-AP
tech-c:         MB29-AP
nic-hdl:        AI330-AP
remarks:        Generated from irt object IRT-INFONET-AP
remarks:        abuse@eu.bt.net was validated on 2025-06-06
remarks:        matthias.blum@bt.com was validated on 2025-06-25
abuse-mailbox:  abuse@eu.bt.net
mnt-by:         APNIC-ABUSE
last-modified:  2025-06-25T07:26:46Z
source:         APNIC

person:         Matthias Blum
address:        BT
address:        Telecomlaan 9
address:        B-1831 Diegem
address:        Belgium
country:        BE
phone:          +32 2 700 2851
fax-no:         +32 2 200 2851
e-mail:         matthias.blum@bt.com
mnt-by:         MAINT-AP-INFONET
nic-hdl:        MB29-AP
last-modified:  2015-06-05T07:45:20Z
source:         APNIC

route:          203.187.128.0/19
origin:         AS3300
descr:          Infonet Services Corporation 2160 East Grand Avenue
mnt-by:         MAINT-AP-INFONET
last-modified:  2022-06-16T08:11:29Z
source:         APNIC

Overlapping Ranges

BGP prefixes that are contained by 203.187.128.0/19

Range	ASN	Company	Num of IPs
203.187.146.0/24	AS3300	BT GIA SNG	256
203.187.145.0/24	AS3300	BT GIA SNG	256

Nearby Ranges

BGP prefixes that overlap with 203.187.0.0/16

Range	ASN	Company	Num of IPs
203.187.192.0/24	AS18207	YOU Broadband & Cable India Ltd.	256
203.187.193.0/24	AS18207	YOU Broadband & Cable India Ltd.	256
203.187.145.0/24	AS3300	BT GIA SNG	256
203.187.146.0/24	AS3300	BT GIA SNG	256

Hosted domains

There are 6 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.187.142.169	mahindralearning.com	2
203.187.142.182	ecommunication-mahindra.com	1
203.187.133.63	essarsteelorissa.com	1
203.187.142.172	mmpricingsol.com	1
203.187.142.161	mahindrakyc.com	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

126 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.187.145.9	AS3300 British Telecommunications PLC	`1.41ms` from Hong Kong, HK
203.187.128.125	AS3300 British Telecommunications PLC	`0.66ms` from Singapore, SG
203.187.134.130	AS3300 British Telecommunications PLC	`0.57ms` from Sydney, AU
203.187.129.243	AS3300 British Telecommunications PLC	`1.14ms` from Singapore, SG
203.187.130.47	AS3300 British Telecommunications PLC	`0.66ms` from Singapore, SG

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
181.224.104.83	AS52279 ETERNET S.R.L.	`11.56ms` from Buenos Aires, AR
200.115.89.243	AS52375 CABASE Camara Arg de Base de Datos y Serv en Linea	`0.15ms` from Buenos Aires, AR
135.131.52.179	AS4181 TDS TELECOM	`3.21ms` from Chicago, US
14.236.20.227	AS45899 VNPT Corp	`0.96ms` from Da Nang, VN
134.95.156.67	AS5520 Universitaet zu Koeln	`4.50ms` from Frankfurt am Main, DE
221.231.114.131	AS4134 CHINANET-BACKBONE	`8.54ms` from Huai'an, CN
86.156.229.51	AS2856 British Telecommunications PLC	`5.80ms` from London, GB
90.255.241.51	AS5378 Vodafone Limited	`12.34ms` from Manchester, GB
64.156.29.3	AS3064 Ntirety, Inc.	`2.80ms` from Orlando, US
133.18.248.3	AS24282 KAGOYA JAPAN Inc.	`1.04ms` from Osaka, JP
203.212.17.35	AS24233 SUPERLOOP (BigAir)	`0.43ms` from Perth, AU
3.226.39.99	AS14618 Amazon.com, Inc.	`0.17ms` from Reston, US
178.16.77.131	AS29695 Altibox AS	`15.41ms` from Sandefjord, NO
218.51.107.51	AS9318 SK Broadband Co Ltd	`7.25ms` from Seoul, KR
183.173.135.51	AS4538 China Education and Research Network Center	`8.05ms` from Tianjin, CN
52.68.43.179	AS16509 Amazon.com, Inc.	`0.19ms` from Tokyo, JP
153.198.49.147	AS4713 NTT DOCOMO BUSINESS,Inc.	`8.37ms` from Tokyo, JP
62.218.229.3	AS8437 Hutchison Drei Austria GmbH	`1.27ms` from Vienna, AT
14.134.0.19	AS4134 CHINANET-BACKBONE	`2.90ms` from Zhongwei, CN
138.124.2.83	AS41745 Baykov Ilya Sergeevich	`2.01ms` from Amsterdam, NL
87.143.52.115	AS3320 Deutsche Telekom AG	`3.79ms` from Berlin, DE
78.92.237.35	AS5483 Magyar Telekom Plc.	`5.34ms` from Budapest, HU
175.11.35.211	AS4134 CHINANET-BACKBONE	`1.19ms` from Changsha, CN
67.246.146.163	AS11351 Charter Communications Inc	`16.81ms` from Chicago, US
98.129.240.115	AS33070 Rackspace Hosting	`1.06ms` from Dallas, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f5 -m8 203.187.140.130

traceroute to 203.187.140.130 (203.187.140.130): 8 hops max, 52 byte packets

5 [AS3491] 63.222.22.5 0.757 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Osaka, JP

On November 14th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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