AS5400 BT British Telecommunications Limited
🇬🇧Org handle: ORG-CNS3-RIPE
RIPE NCCallocated
Announced Prefixes (BGP)
126total
86 IPv440 IPv6
IPv4 Addresses
Allocated (RIR)699,392
Announced (BGP)734,720
IPv6 Addresses
Allocated (RIR)1.6×10³⁰
Announced (BGP)7.2×10³¹
Prefix Limit (IPv4)
1,000
Prefix Limit (IPv6)
200
Country
🇬🇧 GBRIR
RIPE NCCStatus
allocated
Allocated
1995-08-15
Announced Prefixes
(BGP)126|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - |
1-10 of 126
1 / 13
Allocated Prefixes
(RIR)77Prefix | Country | RIR | Status |
|---|---|---|---|
| 31.95.0.0/21 | 🇬🇧 GB | RIPE | assigned |
| 31.95.14.0/23 | 🇮🇪 IE | RIPE | assigned |
| 31.95.16.0/20 | 🇳🇱 NL | RIPE | assigned |
| 31.95.48.0/21 | 🇧🇪 BE | RIPE | assigned |
| 31.95.56.0/24 | 🇱🇺 LU | RIPE | assigned |
| 31.95.64.0/21 | 🇦🇹 AT | RIPE | assigned |
| 31.95.96.0/19 | 🇩🇪 DE | RIPE | assigned |
| 31.95.160.0/20 | 🇫🇷 FR | RIPE | assigned |
| 31.95.184.0/21 | 🇮🇹 IT | RIPE | assigned |
| 31.95.208.0/21 | 🇨🇭 CH | RIPE | assigned |
1-10 of 77
1 / 8
All 126 announced prefixes of AS5400 →
BGP Neighbours
(seen in AS paths)Upstreams (10)
Networks AS5400 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (55)
Networks whose own prefixes AS5400 passes on: usually its customers.
- AS2856BT UK British Telecommunications Limited561
- AS199541EUROCONTROL EUROCONTROL, The European Organisation For The Safety Of Air Navigation41
- AS8968BT Italia RETELIT X S.R.L22
- AS2110BTIRE Enet Communications LIMITED17
- AS13205British Telecommunications Limited13
- AS30614Dell12
- AS33873Arvato Systems Arvato Systems9
- AS21000ATOS France SAS7
- AS21489SHAPE The North Atlantic Treaty Organization7
- AS43949MMC Marsh Limited7
- AS15442PG Europe Procter & Gamble Service6
- AS21277Newroz Telecom ASN Allay Nawroz Telecom Company For Communication/6
- AS29063Atos NL Eviden Netherlands B.V5
- AS72Schlumberger Limited4
- AS7246Bristol Myers Squibb Company4
- AS25049STASCO UK Shell Information Technology International B.V4
- AS3573Accenture LLP3
- AS8903AS8903 LYNTIA NETWORKS S.A3
- AS15518CIRC Circular Informationssysteme3
- AS16839SERVICENOW3
- AS22683PHILIPS INTERNET Koninklijke Philips N.V3
- AS40126Molson Coors Beverage Company3
- AS51046BRINGOIE Bringo Limited3
- AS212565SPECSAVERS Optical Group Limited3
- AS2906Netflix Streaming Services2
- AS8590Bayerische Motoren Werke Aktiengesellschaft2
- AS12298QIAGEN2
- AS15466ASN DTO Commando Materieel En IT2
- AS20561AS20561 INA Schaeffler Technologies & . KG2
- AS21433AccentureFSSC Accenture UK Limited2
- AS25261IBERIA LINEAS AEREAS DE ESPANA SOCIEDAD ANONIMA OPERADORA2
- AS26380MasterCard Technologies2
- AS31614ECB European Central Bank2
- AS34311LG CNS Europe B.V2
- AS51466Bridgestone Europe Bridgestone Europe NV2
- AS59724REED ELSEVIER EMEA GCC Elsevier Limited2
- AS203990Acc Eu Accertify2
- AS5091Stripe1
- AS7734Toronto Dominion Bank1
- AS12257Dell1
- AS12331AUDI1
- AS12734FIAT AS1 Stellantis Auto SAS1
- AS27311Biogen MA1
- AS28879SATURN MEDIA CECONOMY1
- AS30864Elavon Financial Services DAC Elavon Financial Services DAC1
- AS34460PHOENIX International Holdings1
- AS43033Telio Communications Telio Communications1
- AS48647SOLVAY1
- AS51527AUTOEVER EUROPE Hyundai AutoEver Europe1
- AS60112Clarins HQ Clarins SAS1
- AS202097IBERMUTUA1
- AS202666IFF CPH International Flavors & Fragrances I.F.F. (Nederland) B.V1
- AS207180Hud HCL Technologies Germany1
- AS208053Clarins HQ Clarins SAS1
- AS394805ReliaQuest1
ASPA
No ASPA
Abuse Contact
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS5400 should publish an ASPA object
- IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/5400Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/5400" | jq