AS13205
British Telecommunications PLC
GBUnknown2026-06-13
Announced prefixes 16
31.11.56.0/2378.109.0.0/2078.109.0.0/2478.109.5.0/2478.109.6.0/2478.109.7.0/2478.109.9.0/2478.109.10.0/2478.109.11.0/24137.213.239.0/24137.213.252.0/23217.140.0.0/20217.140.12.0/22217.140.12.0/24217.140.13.0/24217.140.32.0/19Snapshot history
| Date | Name | Country | Class | Prefixes |
|---|---|---|---|---|
| 2026-11-15 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-14 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-13 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-12 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-11 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-10 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-09 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-08 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-07 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-06 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-05 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-04 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-03 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-02 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-11-01 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-31 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-30 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-29 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-28 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-27 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-26 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-25 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-24 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-23 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-22 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-21 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-20 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-19 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-18 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-17 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-16 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-15 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-14 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-13 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-12 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-11 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-10 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-09 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-08 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-07 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-06 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-05 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-04 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-03 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-02 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-10-01 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-30 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-29 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-28 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-27 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-26 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-25 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-24 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-23 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-22 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-21 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-20 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-19 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-18 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-17 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-16 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-15 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-14 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-13 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-12 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-11 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-10 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-09 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-08 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-07 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-06 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-05 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-04 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-03 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-02 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-09-01 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-31 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-30 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-29 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-28 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-27 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-26 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-25 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-24 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-23 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-22 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-21 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-20 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-19 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-18 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-17 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-16 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-15 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-14 | British Telecommunications Limited | GB | Unknown | 14 |
| 2026-08-13 | British Telecommunications Limited | GB | Unknown | 15 |
| 2026-08-12 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-11 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-10 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-09 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-08 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-07 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-06 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-05 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-04 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-03 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-02 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-08-01 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-31 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-30 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-29 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-28 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-27 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-26 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-25 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-24 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-23 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-22 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-21 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-20 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-19 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-18 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-17 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-16 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-15 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-14 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-13 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-12 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-11 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-10 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-09 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-08 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-07 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-06 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-05 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-04 | British Telecommunications Limited | GB | Unknown | 16 |
| 2026-07-03 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-07-02 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-07-01 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-30 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-29 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-28 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-27 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-26 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-25 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-24 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-23 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-22 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-21 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-20 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-19 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-18 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-17 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-16 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-15 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-14 | British Telecommunications PLC | GB | Unknown | 16 |
| 2026-06-13 | British Telecommunications PLC | GB | Unknown | 16 |
IP-block changes
Open full filtered history →| Observed | Block | Action | Previous origins | New origins |
|---|---|---|---|---|
| 2026-08-14 | 137.213.239.0/24 | Released | AS13205 | — |
| 2026-08-13 | 137.213.252.0/23 | Released | AS13205 | — |
Changes page 1