Home Prefix Lookup81.1.64.0/18

81.1.64.0/18 - OPALTELECOM TalkTalk Communications Limited (AS13285)

IPv4RIPE NCCallocatedAS13285OPALTELECOM-AS TalkTalk Communications Limited RPKI Valid

CIDR

81.1.64.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇬🇧 United Kingdom

City

London

RIR

RIPE NCC

Status

allocated

Allocated

2002-01-17

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
81.1.64.0/18	AS13285 OPALTELECOM-AS TalkTalk Communications Limited	Valid	RIPE	2026-10-11

More-Specific Announcements

1 more-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
81.1.72.0/24	AS13285 OPALTELECOM-AS TalkTalk Communications Limited	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
81.1.64.0/18	AS13285	/24	ripe
81.1.64.0/18	AS19905	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS19905	Other IRR	MAINT-AS19905	2023-11-13
AS13285	RIPE	TALKTALK-MNT	2025-09-05

More Specific Prefixes

Prefix	Country	Status
81.1.64.0/20	🇬🇧GB	assigned
81.1.80.0/20	🇬🇧GB	assigned
81.1.96.0/19	🇬🇧GB	assigned

Transfer History

Registry transfers of 81.1.64.0/18, blocks inside it, or blocks containing it.

81.1.64.0/18Transfer · 2018-12-05
Tiscali UK Limited
RIPE NCC
→
TalkTalk Communications Limited
RIPE NCC

Date	Resource	From	To	Type
2018-12-05	81.1.64.0/18	Tiscali UK Limited RIPE NCC	TalkTalk Communications Limited RIPE NCC	Transfer

Origin ASN

AS13285

OPALTELECOM-AS TalkTalk Communications Limited

Related Prefixes

More prefixes of AS13285

All prefixes of AS13285 →

Geolocation

Country🇬🇧United KingdomGB

RegionEngland

CityLondon

Coordinates51.5072, -0.1276 ↗

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 RIPE NCC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/81.1.64.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/81.1.64.0/18" | jq

External Links

RIPEstat