HomePrefix Lookup81.128.0.0/12

81.128.0.0/12

🇬🇧
IPv4RIPEassignedAS2856BT-UK-AS British Telecommunications PLC RPKI Valid
CIDR
81.128.0.0/12
IP Version
IPv4
Addresses
1M
Mask
/12 (255.240.0.0)
Country
🇬🇧 United Kingdom
City
Newport
RIR
RIPE
Status
assigned
Allocated
-

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
81.128.0.0/12AS2856BT-UK-AS British Telecommunications PLC Valid
RIPE
6/13/2026

Covering Prefix

1 less-specific announcement
PrefixOrigin ASRPKIIRRLast Seen
81.128.0.0/11AS2856BT-UK-AS British Telecommunications PLC Valid—6/13/2026

RPKI ROAs

2
PrefixOriginMax LengthTrust Anchor
81.128.0.0/12AS2856/12ripe
81.128.0.0/11AS2856/11ripe

IRR Route Objects

1
OriginRegistryMaintainerModified
AS2856RIPEBTNET-INFRA-MNT7/31/2014

More Specific Prefixes

100
PrefixASCountryStatus
81.132.0.0/16🇬🇧GBassigned
81.129.0.0/16🇬🇧GBassigned
81.141.0.0/16🇬🇧GBassigned
81.136.0.0/17🇬🇧GBassigned
81.128.0.0/17🇬🇧GBassigned
81.135.0.0/17🇬🇧GBassigned
81.140.0.0/17🇬🇧GBassigned
81.140.192.0/18🇬🇧GBassigned
81.135.192.0/18🇬🇧GBassigned
81.135.160.0/19🇬🇧GBassigned
81.131.160.0/19🇬🇧GBassigned
81.130.160.0/19🇬🇧GBassigned
81.139.128.0/19🇬🇧GBassigned
81.130.128.0/19🇬🇧GBassigned
81.139.192.0/19🇬🇧GBassigned
81.131.96.0/19🇬🇧GBassigned
81.130.224.0/19🇬🇧GBassigned
81.139.224.0/19🇬🇧GBassigned
81.140.160.0/19🇬🇧GBassigned
81.133.0.0/19🇬🇧GBassigned
81.139.96.0/19🇬🇧GBassigned
81.133.128.0/19🇬🇧GBassigned
81.139.64.0/19🇬🇧GBassigned
81.139.160.0/19🇬🇧GBassigned
81.134.160.0/19🇬🇧GBassigned
81.131.192.0/19🇬🇧GBassigned
81.136.160.0/19🇬🇧GBassigned
81.139.0.0/19🇬🇧GBassigned
81.133.32.0/20🇬🇧GBassigned
81.134.224.0/20🇬🇧GBassigned
81.134.32.0/20🇬🇧GBassigned
81.134.0.0/20🇬🇧GBassigned
81.134.80.0/20🇬🇧GBassigned
81.130.96.0/20🇬🇧GBassigned
81.131.128.0/20🇬🇧GBassigned
81.131.80.0/20🇬🇧GBassigned
81.131.224.0/20🇬🇧GBassigned
81.137.224.0/20🇬🇧GBassigned
81.133.160.0/20🇬🇧GBassigned
81.137.240.0/20🇬🇧GBassigned
81.133.224.0/20🇬🇧GBassigned
81.133.112.0/20🇬🇧GBassigned
81.134.48.0/20🇬🇧GBassigned
81.130.192.0/20🇬🇧GBassigned
81.135.144.0/20🇬🇧GBassigned
81.138.0.0/20🇬🇧GBassigned
81.136.224.0/20🇬🇧GBassigned
81.133.80.0/20🇬🇧GBassigned
81.136.208.0/20🇬🇧GBassigned
81.137.192.0/20🇬🇧GBassigned
81.133.208.0/20🇬🇧GBassigned
81.130.0.0/20🇬🇧GBassigned
81.130.80.0/20🇬🇧GBassigned
81.136.128.0/20🇬🇧GBassigned
81.133.192.0/20🇬🇧GBassigned
81.136.200.0/21🇬🇧GBassigned
81.136.192.0/21🇬🇧GBassigned
81.130.208.0/21🇬🇧GBassigned
81.131.144.0/21🇬🇧GBassigned
81.133.184.0/21🇬🇧GBassigned
81.130.112.0/21🇬🇧GBassigned
81.133.248.0/21🇬🇧GBassigned
81.136.152.0/21🇬🇧GBassigned
81.130.120.0/21🇬🇧GBassigned
81.131.240.0/21🇬🇧GBassigned
81.130.216.0/21🇬🇧GBassigned
81.133.72.0/21🇬🇧GBassigned
81.134.112.0/21🇬🇧GBassigned
81.133.96.0/21🇬🇧GBassigned
81.137.208.0/21🇬🇧GBassigned
81.137.216.0/21🇬🇧GBassigned
81.134.208.0/21🇬🇧GBassigned
81.136.144.0/21🇬🇧GBassigned
81.135.128.0/21🇬🇧GBassigned
81.134.104.0/21🇬🇧GBassigned
81.133.48.0/21🇬🇧GBassigned
81.134.64.0/21🇬🇧GBassigned
81.134.216.0/21🇬🇧GBassigned
81.136.248.0/21🇬🇧GBassigned
81.136.240.0/21🇬🇧GBassigned
81.134.120.0/21🇬🇧GBassigned
81.131.72.0/21🇬🇧GBassigned
81.133.104.0/21🇬🇧GBassigned
81.133.240.0/21🇬🇧GBassigned
81.134.16.0/21🇬🇧GBassigned
81.134.24.0/21🇬🇧GBassigned
81.134.72.0/21🇬🇧GBassigned
81.138.16.0/22🇬🇧GBassigned
81.139.56.0/22🇬🇧GBassigned
81.131.156.0/22🇬🇧GBassigned
81.133.68.0/22🇬🇧GBassigned
81.131.64.0/22🇬🇧GBassigned
81.135.136.0/22🇬🇧GBassigned
81.134.204.0/22🇬🇧GBassigned
81.134.96.0/22🇬🇧GBassigned
81.133.56.0/22🇬🇧GBassigned
81.128.252.0/23🇬🇧GBassigned
81.128.214.0/23🇬🇧GBassigned
81.133.60.0/23🇬🇧GBassigned
81.134.102.0/23🇬🇧GBassigned
Origin ASN
AS2856
BT-UK-AS British Telecommunications PLC
Geolocation
Country🇬🇧United KingdomGB
RegionWales
CityNewport
Coordinates51.5886, -3.0053 ↗
Abuse Contact
API
Open
GEThttps://api.ipctl.io/v1/prefix/81.128.0.0/12

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/81.128.0.0/12" | jq
External Links
RIPEstat Hurricane Electric BGP