Home Prefix Lookup81.172.48.0/21

81.172.48.0/21 - BGP Prefix

IPv4RIPE NCCallocated RPKI Valid

CIDR

81.172.48.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

Dallas (Victory Park)

RIR

RIPE NCC

Status

allocated

Allocated

2003-01-14

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

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Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

8 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
81.172.48.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.49.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.50.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.51.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.52.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.53.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.54.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12
81.172.55.0/24	AS398781 OSL-188 - OCULUS NETWORKS INC	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
81.172.48.0/21	AS398781	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS398781	Other IRR	MAINT-AS14713	2026-09-25

Transfer History

Registry transfers of 81.172.48.0/21, blocks inside it, or blocks containing it.

81.172.48.0/21Transfer · 2026-03-10
VODAFONE ONO, S.A.
🇪🇸 ES RIPE NCC
→
steel-axis LLC
🇺🇸 US RIPE NCC

Date	Resource	From	To	Type
2026-03-10	81.172.48.0/21	VODAFONE ONO, S.A. 🇪🇸 ES RIPE NCC	steel-axis LLC 🇺🇸 US RIPE NCC	Transfer

Geolocation

Country🇺🇸United StatesUS

RegionTexas

CityDallas (Victory Park)

Coordinates32.7947, -96.8089 ↗

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/81.172.48.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/81.172.48.0/21" | jq

External Links

RIPEstat