Autonomous System details
AS5400
British Telecommunications PLC — bt.net
Summary
| Country |
 United Kingdom
|
| Organization | British Telecommunications PLC |
| Domain | bt.net |
| Number of IPv4 | 882,176 |
| Number of IPv6 | 7.2335× 1031 |
| AS Type | ISP |
| Registry | RIPE NCC |
| Allocated | August 29, 2002 (about 22 years ago) |
| Updated | April 01, 2025 (about 13 days ago) |
IP Ranges
AS5400 announces 101 IPv4 ranges and 8 IPv6 ranges.
That's a total of 882,176 IPv4 addresses and 7.2335× 1031 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 8.12.61.0/24 |
 Millward Brown, Inc.
|
256 | ARIN | REASSIGNMENT |
| 31.95.0.0/16 |
British Telecommunications PLC
|
65,536 | RIPE NCC | ASSIGNED PA |
| 31.95.0.0/21 |
British Telecommunications PLC
|
2,048 | RIPE NCC | ASSIGNED PA |
| 31.95.14.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 31.95.16.0/20 |
 British Telecommunications PLC
|
4,096 | RIPE NCC | ASSIGNED PA |
| 31.95.48.0/21 |
 British Telecommunications PLC
|
2,048 | RIPE NCC | ASSIGNED PA |
| 31.95.56.0/24 |
 British Telecommunications PLC
|
256 | RIPE NCC | ASSIGNED PA |
| 31.95.58.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 31.95.64.0/21 |
 British Telecommunications PLC
|
2,048 | RIPE NCC | ASSIGNED PA |
| 31.95.72.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.80.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.96.0/19 |
 British Telecommunications PLC
|
8,192 | RIPE NCC | ASSIGNED PA |
| 31.95.128.0/20 |
British Telecommunications PLC
|
4,096 | RIPE NCC | ASSIGNED PA |
| 31.95.160.0/20 |
 British Telecommunications PLC
|
4,096 | RIPE NCC | ASSIGNED PA |
| 31.95.176.0/22 |
British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.184.0/21 |
 British Telecommunications PLC
|
2,048 | RIPE NCC | ASSIGNED PA |
| 31.95.208.0/21 |
 British Telecommunications PLC
|
2,048 | RIPE NCC | ASSIGNED PA |
| 31.95.218.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 31.95.220.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.228.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.232.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.238.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 31.95.240.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.246.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 31.95.248.0/22 |
 British Telecommunications PLC
|
1,024 | RIPE NCC | ASSIGNED PA |
| 31.95.254.0/23 |
 British Telecommunications PLC
|
512 | RIPE NCC | ASSIGNED PA |
| 46.248.8.0/23 |
Fedex Express International B.V.
|
512 | RIPE NCC | ASSIGNED PA |
| 46.248.10.0/23 |
Fedex Express International B.V.
|
512 | RIPE NCC | ASSIGNED PA |
| 62.5.0.0/17 |
BT
|
32,768 | RIPE NCC | ASSIGNED PA |
| 62.102.0.0/17 |
British Telecommunications PLC
|
32,768 | RIPE NCC | ALLOCATED PA |
| 62.134.0.0/16 |
British Telecommunications PLC
|
65,536 | RIPE NCC | ALLOCATED PA |
| 62.172.0.0/21 |
 PROVIDER
|
2,048 | RIPE NCC | LIR-PARTITIONED PA |
| 62.173.192.0/18 |
British Telecommunications PLC
|
16,384 | RIPE NCC | ALLOCATED PA |
| 62.180.0.0/16 |
SASOL CHEMICAL INDUSTRIES PTY LTD
|
65,536 | RIPE NCC | ASSIGNED PA |
| 77.72.239.0/24 |
IPNEXIA LUX PE
|
256 | RIPE NCC | ASSIGNED PA |
| 80.255.160.0/24 |
BT Global Services Luxembourg
|
256 | RIPE NCC | SUB-ALLOCATED PA |
| 80.255.160.0/20 |
BT Global Services Luxembourg
|
4,096 | RIPE NCC | SUB-ALLOCATED PA |
| 80.255.161.0/24 |
BT Global Services Luxembourg
|
256 | RIPE NCC | ASSIGNED PA |
| 80.255.162.0/24 |
BT Global Services Luxembourg
|
256 | RIPE NCC | ASSIGNED PA |
| 82.138.160.0/19 |
AF-Raackmann
|
8,192 | RIPE NCC | ASSIGNED PA |
| 82.150.0.0/19 |
Primark Btir
|
8,192 | RIPE NCC | ASSIGNED PA |
| 85.235.109.0/24 |
Interconnector LTD
|
256 | RIPE NCC | ALLOCATED PA |
| 130.41.240.0/24 |
Palo Alto Networks, INC
|
256 | ARIN | ALLOCATION |
| 130.41.241.0/24 |
Palo Alto Networks, INC
|
256 | ARIN | ALLOCATION |
| 132.244.64.0/21 |
Rolls-royce PLC
|
2,048 | RIPE NCC | LEGACY |
| 132.244.72.0/21 |
Rolls-royce PLC
|
2,048 | RIPE NCC | LEGACY |
| 132.244.240.0/24 |
Rolls-royce PLC
|
256 | RIPE NCC | LEGACY |
| 136.238.84.0/24 |
Schindler Informatik AG
|
256 | ARIN | REASSIGNMENT |
| 136.238.85.0/24 |
Schindler Informatik AG
|
256 | ARIN | REASSIGNMENT |
| 136.238.224.0/24 |
Schindler Informatik AG
|
256 | ARIN | REASSIGNMENT |
| 137.213.54.0/24 |
Sopra Steria Limited
|
256 | RIPE NCC | LEGACY |
| 137.213.249.0/24 |
Sopra Steria Limited
|
256 | RIPE NCC | LEGACY |
| 144.95.32.0/19 |
Akzo Nobel Coatings
|
8,192 | RIPE NCC | LEGACY |
| 144.95.96.0/19 |
Akzo Nobel Coatings
|
8,192 | RIPE NCC | LEGACY |
| 166.49.128.0/17 |
British Telecommunications PLC
|
32,768 | RIPE NCC | LEGACY |
| 168.252.132.0/24 |
 Orica Australia Pty LTD
|
256 | APNIC | ALLOCATED PORTABLE |
| 168.252.133.0/24 |
Orica Australia Pty LTD
|
256 | APNIC | ALLOCATED PORTABLE |
| 169.129.0.0/16 |
 Sasol South Africa (pty) LTD
|
65,536 | AFRINIC | ASSIGNED PI |
| 171.33.172.0/24 |
AFN TECHNOLOGY LIMITED
|
256 | RIPE NCC | ALLOCATED PA |
| 185.94.0.0/22 |
British Telecommunications PLC
|
1,024 | RIPE NCC | ALLOCATED PA |
| 185.249.4.0/24 |
Rotterdam-Lumileds
|
256 | RIPE NCC | ASSIGNED PA |
| 192.35.130.0/24 |
KPN B.V.
|
256 | RIPE NCC | LEGACY |
| 192.109.52.0/24 |
Thales Deutschland GmbH
|
256 | RIPE NCC | ASSIGNED PI |
| 193.32.17.0/24 |
Gkn Group Services Limited
|
256 | RIPE NCC | ASSIGNED PI |
| 193.38.169.0/24 |
MARS WRIGLEY CONFECTIONERY UK LIMITED
|
256 | RIPE NCC | ASSIGNED PI |
| 193.141.192.0/19 |
Renesas Electronics Europe GmbH
|
8,192 | RIPE NCC | ASSIGNED PI |
| 193.202.26.0/24 |
Wpp Deutschland Holding GmbH
|
256 | RIPE NCC | ASSIGNED PI |
| 194.33.53.0/24 |
KANTAR DORMANT 3 LIMITED
|
256 | RIPE NCC | ALLOCATED PA |
| 194.33.54.0/24 |
KANTAR DORMANT 3 LIMITED
|
256 | RIPE NCC | ALLOCATED PA |
| 194.33.55.0/24 |
KANTAR DORMANT 3 LIMITED
|
256 | RIPE NCC | ALLOCATED PA |
| 194.50.160.0/24 |
Hyundai Motor Europe GmbH
|
256 | RIPE NCC | ASSIGNED PI |
| 194.60.96.0/24 |
Unilever PLC
|
256 | RIPE NCC | ASSIGNED PI |
| 194.60.99.0/24 |
Unilever PLC
|
256 | RIPE NCC | ASSIGNED PI |
| 194.74.80.0/21 |
Amsterdam
|
2,048 | RIPE NCC | ASSIGNED PA |
| 194.76.40.0/24 |
BT (germany) GmbH & Co. Ohg
|
256 | RIPE NCC | ASSIGNED PI |
| 194.107.114.0/24 |
Ceva France SASU
|
256 | RIPE NCC | ASSIGNED PI |
| 194.213.64.0/19 |
BT Nordics Ce Wan Links
|
8,192 | RIPE NCC | ASSIGNED PA |
| 195.60.182.0/24 |
Delaval International Ab
|
256 | RIPE NCC | ASSIGNED PI |
| 195.60.183.0/24 |
Delaval International Ab
|
256 | RIPE NCC | ASSIGNED PI |
| 195.66.70.0/24 |
Kia Europe GmbH
|
256 | RIPE NCC | ASSIGNED PI |
| 195.90.64.0/19 |
Atradius Btgsuk
|
8,192 | RIPE NCC | ASSIGNED PA |
| 195.99.64.0/20 |
Amsterdam
|
4,096 | RIPE NCC | ASSIGNED PA |
| 195.100.0.0/16 |
British Telecommunications PLC
|
65,536 | RIPE NCC | ALLOCATED PA |
| 195.163.0.0/16 |
British Telecommunications PLC
|
65,536 | RIPE NCC | ALLOCATED PA |
| 195.171.36.0/22 |
BT Belgium
|
1,024 | RIPE NCC | ASSIGNED PA |
| 195.182.96.0/19 |
BT Germany
|
8,192 | RIPE NCC | ASSIGNED PA |
| 198.178.236.0/24 |
KANTAR
|
256 | ARIN | ALLOCATION |
| 204.52.188.0/24 |
KANTAR
|
256 | ARIN | ALLOCATION |
| 206.73.0.0/16 |
Infonet-Internal-Engineering
|
65,536 | ARIN | REASSIGNMENT |
| 212.8.160.0/19 |
Bt-be Research
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.21.192.0/19 |
amazon
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.31.192.0/19 |
Nationale Nederlanden Compaqia De Seguros De Vida Nv
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.41.128.0/19 |
BT Global Services
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.108.0.0/19 |
Tesla Motors Netherlands
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.127.0.0/19 |
DigitPA
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.162.192.0/18 |
British Telecommunications PLC
|
16,384 | RIPE NCC | ALLOCATED PA |
| 213.15.0.0/16 |
Vaillant Group
|
65,536 | RIPE NCC | ASSIGNED PA |
| 213.137.160.0/19 |
EXP547262
|
8,192 | RIPE NCC | ASSIGNED PA |
| 213.194.0.0/18 |
PHILIPS ELECTRONICS
|
16,384 | RIPE NCC | ASSIGNED PA |
| 213.236.64.0/18 |
British Telecommunications PLC
|
16,384 | RIPE NCC | ALLOCATED PA |
| 217.67.47.0/24 |
E.on Digital Technology GmbH
|
256 | RIPE NCC | ALLOCATED PA |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2001:740::/32 |
British Telecommunications PLC
|
7.9228× 1028 | RIPE NCC | ALLOCATED-BY-RIR |
| 2a00:2000::/23 |
BT Infrastructure Eu
|
4.0565× 1031 | RIPE NCC | ALLOCATED-BY-LIR |
| 2a00:2200::/25 |
British Telecommunications PLC
|
1.0141× 1031 | RIPE NCC | ALLOCATED-BY-RIR |
| 2a00:2280::/25 |
British Telecommunications PLC
|
1.0141× 1031 | RIPE NCC | ALLOCATED-BY-RIR |
| 2a00:2300::/25 |
British Telecommunications PLC
|
1.0141× 1031 | RIPE NCC | ALLOCATED-BY-LIR |
| 2a02:e440::/29 |
Muenchener Rueckversicherungs Gesellschaft AG
|
6.3383× 1029 | RIPE NCC | ALLOCATED-BY-RIR |
| 2a0c:7c80::/29 |
THALES-GERMANY-HOSTS
|
6.3383× 1029 | RIPE NCC | ASSIGNED |
| 2a0e:e500:1::/48 |
EUCOUNCIL-v6-conferencenet
|
1.2089× 1024 | RIPE NCC | ASSIGNED |
Peers
AS5400 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
AS42
AS174
AS286
AS680
AS719
AS766
AS1120
AS1239
AS1267
AS1273
AS1828
AS1836
AS1853
AS1955
AS2119
AS2497
AS2516
AS2603
AS2686
AS2906
AS3257
AS3303
AS3320
AS3333
AS3491
AS4181
AS4637
AS4775
AS5413
AS5432
AS5511
AS5650
AS6079
AS6128
AS6453
AS6461
AS6730
AS6762
AS6830
AS6939
AS7029
AS7713
AS8218
AS8220
AS8283
AS8447
AS8473
AS8966
AS9002
AS9009
AS9121
AS11164
AS12389
AS12430
AS12552
AS12883
AS12956
AS13030
AS13335
AS14361
AS14907
AS15412
AS16147
AS19151
AS20485
AS20940
AS21277
AS21320
AS23764
AS24961
AS29119
AS30103
AS30781
AS31027
AS33891
AS35280
AS37100
AS37468
AS39351
AS39737
AS40934
AS41095
AS42708
AS49544
AS50304
AS52320
AS57976
AS58453
AS60068
AS132203
AS199524
Upstreams
AS5400 connects to the global Internet via at least 2 upstream providers. In this setup, AS5400 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS5400 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS5400's role in extending Internet access beyond its own infrastructure.
AS2110
AS2856
AS7246
AS7734
AS8590
AS8903
AS8968
AS9183
AS10780
AS12257
AS12298
AS12331
AS12440
AS12734
AS13130
AS13205
AS15410
AS15466
AS15518
AS16839
AS20561
AS20868
AS21000
AS21489
AS22683
AS25049
AS25261
AS26380
AS28879
AS29063
AS30614
AS30864
AS31614
AS33873
AS34311
AS34460
AS35740
AS35923
AS38191
AS40126
AS40999
AS41321
AS41596
AS42848
AS43033
AS43949
AS48647
AS51046
AS51466
AS51527
AS60112
AS196636
AS199541
AS200361
AS200500
AS202097
AS202666
AS202893
AS203990
AS206625
AS207180
AS208053
AS212565
AS394805