Home Prefix Lookup83.245.16.0/21

83.245.16.0/21 - BT UK British Telecommunications Limited (AS2856)

IPv4RIPE NCCannouncedAS2856BT-UK-AS British Telecommunications Limited RPKI Valid

CIDR

83.245.16.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇬🇧 United Kingdom

City

London

RIR

RIPE NCC

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
83.245.16.0/21	AS2856 BT-UK-AS British Telecommunications Limited	Valid	RIPE	2026-10-12

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
83.245.0.0/17	AS3257 GTT-BACKBONE GTT Communications Inc.	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
83.245.16.0/21	AS2856	/21	ripe
83.245.0.0/17	AS3257	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS2856	RIPE	AS3257-IPAM-MNT	2026-07-09

More Specific Prefixes

Prefix	Country	Status
83.245.16.0/24	🇱🇹LT	assigned
83.245.17.0/24	🇱🇹LT	assigned
83.245.18.0/24	🇱🇹LT	assigned
83.245.19.0/24	🇱🇹LT	assigned
83.245.20.0/24	🇱🇹LT	assigned
83.245.21.0/24	🇱🇹LT	assigned
83.245.22.0/24	🇱🇹LT	assigned
83.245.23.0/24	🇱🇹LT	assigned

Origin ASN

AS2856

BT-UK-AS British Telecommunications Limited

Related Prefixes

Covering prefix

83.245.0.0/17AS3257

More prefixes of AS2856

All prefixes of AS2856 →

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/83.245.16.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/83.245.16.0/21" | jq

External Links

RIPEstat