64.205.136.0/22 - BT UK British Telecommunications Limited (AS2856)
CIDR
64.205.136.0/22
IP Version
IPv4
Addresses
1K
Mask
/22 (255.255.252.0)
Country
🇬🇧 United Kingdom
City
London
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 64.205.136.0/22 | AS2856 BT-UK-AS British Telecommunications Limited | Valid | ARIN | 2026-10-12 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 64.204.0.0/15 | AS3257 GTT-BACKBONE GTT Communications Inc. | No ROA | - | 2026-10-12 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 64.205.136.0/22 | AS2856 | /22 | arin |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS2856 | ARIN | MNT-GAL-104 | 2026-06-11 |
Transfer History
Registry transfers of 64.205.136.0/22, blocks inside it, or blocks containing it.
- 64.204.0.0/15M&A ·
- 64.204.0.0/15M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 64.204.0.0/15 | M&A | |||
| 64.204.0.0/15 | M&A |
Related Prefixes
Geolocation
Country🇬🇧United KingdomGB
CityLondon
Abuse Contact
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/64.205.136.0/22Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/64.205.136.0/22" | jq
External Links