31.121.0.0/16

AS2856 · British Telecommunications PLC

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Summary

Country	United Kingdom
Domain	bt.com
ASN	AS2856
Registry	RIPE
ID	BTNET-1

WHOIS Details

inetnum:        31.121.0.0 - 31.121.255.255
netname:        BTnet-1
descr:          BTnet Assignments
country:        GB
admin-c:        BS1474-RIPE
tech-c:         BS1474-RIPE
status:         LIR-PARTITIONED PA
mnt-lower:      BTNET-MNT
mnt-routes:     BTNET-MNT
mnt-by:         AS12576-MNT
created:        2019-05-28T10:18:07Z
last-modified:  2019-05-28T10:19:53Z
source:         RIPE
abuse-email:    abuse@ee.co.uk
abuse-c:        EA8069-RIPE
abuse-org:      ORG-TIUL1-RIPE

role:           BTnet Support
address:        Adhara
address:        Adastral Park
address:        Martlesham Heath
address:        Ipswich
address:        SUFFLK IP5 3RE
address:        GB
phone:          +44 800 0858963 5
phone:          +44 1473 336231
e-mail:         as2856peering@bt.com
e-mail:         btnetdns@bt.com
admin-c:        FLS15-RIPE
tech-c:         FLS15-RIPE
nic-hdl:        BS1474-RIPE
remarks:        For all queries contact as2856peering@bt.com
remarks:        Please send delisting issues to btnetdns@bt.com
mnt-by:         BTNET-MNT
created:        2002-04-30T07:54:10Z
last-modified:  2025-07-18T13:07:21Z
source:         RIPE

route:          31.121.0.0/16
origin:         AS2856
mnt-by:         BTNET-INFRA-MNT
mnt-by:         AS12576-MNT
created:        2018-10-02T09:02:10Z
last-modified:  2019-05-22T12:43:09Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 31.0.0.0/8

Range	ASN	Company	Num of IPs
31.224.0.0/11	AS3320	Telekom Deutschland GmbH	2,097,152
31.48.0.0/13	AS2856	British Telecommunications PLC	524,288
31.32.0.0/13	AS5410	Bouygues Telecom SA	524,288
31.156.0.0/14	AS30722	Vodafone Italia S.p.A.	262,144
31.16.0.0/14	AS3209	Vodafone Deutschland GmbH	262,144
31.136.0.0/14	AS33915	Vodafone Libertel B.V.	262,144
31.60.0.0/14	AS5617	Orange Polska Spolka Akcyjna	262,144
31.92.0.0/15	AS2856	EE Limited	131,072
31.212.0.0/15	AS3320	Telekom Deutschland GmbH	131,072
31.180.0.0/15	AS12389	PJSC Rostelecom	131,072
31.126.0.0/15	AS2856	BT Retail	131,072
31.218.0.0/15	AS5384	EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC	131,072
31.90.0.0/15	AS2856	EE Limited	131,072
31.160.0.0/15	AS1136	KPN B.V.	131,072
31.162.0.0/15	AS12389	PJSC Rostelecom	131,072
31.164.0.0/15	AS6730	Sunrise GmbH	131,072
31.174.0.0/15	AS39603	P4 Sp. z o.o.	131,072
31.166.0.0/15	AS34400	Etihad Etisalat, a joint stock company	131,072
31.0.0.0/16	AS8374	Polkomtel Sp. z o.o.	65,536
31.188.0.0/16	AS24608	WIND TRE S.P.A.	65,536
31.189.0.0/16	AS24608	WIND TRE S.P.A.	65,536
31.30.0.0/16	AS16019	Vodafone Czech Republic a.s.	65,536
31.26.0.0/16	AS30722	IP subnet assigned to VF customers	65,536
31.168.0.0/16	AS8551	Bezeq International Ltd.	65,536
31.151.0.0/16	AS33915	Ziggo Services B.V.	65,536
31.144.0.0/16	AS21497	PrJSC VF UKRAINE	65,536
31.206.0.0/16	AS15924	Vodafone Net Iletisim Hizmetler AS	65,536
31.215.0.0/16	AS5384	EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC	65,536
31.20.0.0/16	AS50266	Pool for fixed WBA users	65,536
31.206.0.0/16	AS8386	Vodafone Net Iletisim Hizmetler AS	65,536
31.201.0.0/16	AS50266	Pool for fixed WBA, ODF and VULA users	65,536
31.145.0.0/16	AS8386	Vodafone Net Iletisim Hizmetler AS	65,536
31.150.0.0/16	AS9145	EWE TEL GmbH	65,536
31.152.0.0/16	AS29247	Ote SA (Hellenic Telecommunications Organisation)	65,536
31.23.0.0/16	AS12389	PJSC Rostelecom	65,536
31.164.0.0/16	AS6730	sunrise Communications AG	65,536
31.96.0.0/16	AS2856	EE Limited	65,536
31.125.0.0/16	AS6871	Plusnet Broadband	65,536
31.147.0.0/16	AS2108	Croatian Academic and Research Network	65,536
31.154.0.0/16	AS12400	Partner Communications Ltd.	65,536
31.148.0.0/16	AS44546		65,536
31.165.0.0/16	AS6730	sunrise Communications AG	65,536
31.202.0.0/16	AS34700	MAXNET TELECOM, LTD	65,536
31.21.0.0/16	AS50266	Pool for fixed WBA users	65,536
31.120.0.0/16	AS2856	EE Limited	65,536
31.173.0.0/16	AS31133	PJSC MegaFon	65,536
31.218.0.0/16	AS5384	Emirates Telecommunications Corporation	65,536
31.190.0.0/16	AS1267	Network and company tech merge from AS24608 into As1267	65,536
31.145.0.0/16	AS15924	Vodafone Net Iletisim Hizmetler AS	65,536

Hosted domains

There are 156 domain names hosted across 75 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
31.121.125.85	raiseeducationtrust.org	23
31.121.9.150	rathsherrywindfarm.com	14
31.121.9.211	coolberrinwindfarm.ie	11
31.121.244.219	eurospares.co.uk	8
31.121.52.182	aslatravelgroup.com	5
31.121.112.23	saucypackets.com	5
31.121.149.24	glokal.biz	5
31.121.141.165	financegems.com	4
31.121.171.189	chersoft.com	3
31.121.160.102	airemap-api.com	3
31.121.111.115	ehbs.co.uk	3
31.121.27.253	hughestrade.com	3
31.121.66.162	ingeniousdarlington.co.uk	3
31.121.112.25	purplehamster.com	3
31.121.52.179	select-traveller.com	2
31.121.9.184	powerni.co.uk	2
31.121.151.163	desigocc.co.uk	2
31.121.155.214	digi-bee.uk	2
31.121.54.155	crazyboaters.co.uk	2
31.121.203.52	prfi.com	2

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

7,787 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
31.121.4.5	AS2856 British Telecommunications PLC	`1.56ms` from London, GB
31.121.22.26	AS2856 British Telecommunications PLC	`0.91ms` from London, GB
31.121.43.49	AS2856 British Telecommunications PLC	`1.08ms` from London, GB
31.121.28.19	AS2856 British Telecommunications PLC	`2.27ms` from London, GB
31.121.48.245	AS2856 British Telecommunications PLC	`1.59ms` from London, GB
31.121.49.121	AS2856 British Telecommunications PLC	`1.02ms` from London, GB
31.121.52.114	AS2856 British Telecommunications PLC	`1.20ms` from London, GB
31.121.55.113	AS2856 British Telecommunications PLC	`1.55ms` from London, GB
31.121.5.242	AS2856 British Telecommunications PLC	`1.59ms` from London, GB
31.121.29.10	AS2856 British Telecommunications PLC	`1.83ms` from London, GB
31.121.46.165	AS2856 British Telecommunications PLC	`1.56ms` from London, GB
31.121.60.113	AS2856 British Telecommunications PLC	`1.96ms` from London, GB
31.121.35.10	AS2856 British Telecommunications PLC	`2.39ms` from London, GB
31.121.38.106	AS2856 British Telecommunications PLC	`2.11ms` from London, GB
31.121.40.20	AS2856 British Telecommunications PLC	`1.82ms` from London, GB
31.121.18.54	AS2856 British Telecommunications PLC	`2.72ms` from London, GB
31.121.14.235	AS2856 British Telecommunications PLC	`4.54ms` from London, GB
31.121.2.146	AS2856 British Telecommunications PLC	`1.11ms` from London, GB
31.121.33.190	AS2856 British Telecommunications PLC	`1.19ms` from London, GB
31.121.39.81	AS2856 British Telecommunications PLC	`1.08ms` from London, GB
31.121.62.241	AS2856 British Telecommunications PLC	`0.97ms` from London, GB
31.121.0.169	AS2856 British Telecommunications PLC	`1.81ms` from London, GB
31.121.10.122	AS2856 British Telecommunications PLC	`1.95ms` from London, GB
31.121.24.194	AS2856 British Telecommunications PLC	`2.51ms` from London, GB
31.121.64.73	AS2856 British Telecommunications PLC	`1.90ms` from London, GB

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
2.242.193.16	AS6805 Telefonica Germany GmbH & Co.OHG	`2.71ms` from Berlin, DE
45.184.39.240	AS269305 George Izui Me	`8.25ms` from Chapeco, BR
179.185.30.64	AS18881 TELEFÔNICA BRASIL S.A	`11.36ms` from Fortaleza, BR
31.167.60.0	AS35819 Etihad Etisalat, a joint stock company	`3.44ms` from Jeddah, SA
41.205.50.32	AS36907 TV CABO ANGOLA LDA	`1.83ms` from Luanda, AO
80.180.155.128	AS3269 Telecom Italia S.p.A.	`1.60ms` from Milan, IT
116.9.221.112	AS4134 CHINANET-BACKBONE	`0.54ms` from Nanning, CN
175.131.60.192	AS2516 KDDI CORPORATION	`10.55ms` from Osaka, JP
142.252.249.80	AS10557 Connect Northwest Internet Services, LLC	`0.21ms` from Seattle, US
27.232.173.96	AS4766 Korea Telecom	`1.49ms` from Seoul, KR
13.51.224.80	AS16509 Amazon.com, Inc.	`0.11ms` from Stockholm, SE
96.32.53.112	AS20115 Charter Communications LLC	`11.27ms` from Ashburn, US
193.224.81.80	AS1955 KIFU (Governmental Info Tech Development Agency)	`8.62ms` from Budapest, HU
102.42.58.176	AS8452 TE-AS	`3.27ms` from Cairo, EG
175.5.51.32	AS4134 CHINANET-BACKBONE	`6.76ms` from Changsha, CN
104.154.236.144	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
43.157.55.48	AS132203 Tencent Building, Kejizhongyi Avenue	`0.36ms` from Frankfurt am Main, DE
38.89.143.48	AS174 Cogent Communications, LLC	`2.20ms` from Miami, US
94.75.156.128	AS12389 PJSC Rostelecom	`11.87ms` from Moscow, RU
133.114.166.240	AS2527 Sony Network Communications Inc.	`8.70ms` from Osaka, JP
181.77.200.0	AS26615 TIM S/A	`6.99ms` from Osasco, BR
37.68.117.176	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`14.47ms` from Paris, FR
86.208.5.224	AS3215 Orange S.A.	`6.57ms` from Paris, FR
86.225.107.0	AS3215 Orange S.A.	`9.66ms` from Paris, FR
4.154.86.144	AS8075 Microsoft Corporation	`0.35ms` from Quincy, US

Traceroute

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

traceroute -a -n -q1 -f2 31.121.101.250

traceroute to 31.121.101.250 (31.121.101.250): 64 hops max, 52 byte packets

2 [AS9002] 87.245.234.99 84.214 ms

3 [AS2856] 195.99.125.68 86.23 ms

4 [AS2856] 194.72.16.147 85.835 ms

5 [AS2856] 62.6.201.115 90.425 ms

6 [AS2856] 31.119.26.111 90.447 ms

7 [AS2856] 31.121.101.250 93.497 ms

Measurement taken from

IPinfo ProbeNet in Novosibirsk, RU

On October 30th 2025

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