Home Prefix Lookup51.19.128.0/17

51.19.128.0/17 - Cox Communications (AS22773)

IPv4RIPEassignedAS22773ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc. RPKI Valid

CIDR

51.19.128.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇺🇸 United States

City

Chicago

RIR

RIPE

Status

assigned

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
51.19.128.0/17	AS22773 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc.	Valid	Other IRRRIPE	2026-10-12

More-Specific Announcements

16 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
51.19.128.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.136.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.144.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.152.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.160.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.168.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.176.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.184.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.192.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.200.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.208.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.216.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.224.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.232.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.240.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12
51.19.248.0/21	AS6079 RCN-AS - RCN	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
51.19.128.0/17	AS6079	/24	ripe
51.19.128.0/17	AS22773	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS22773	Other IRR	MAINT-AS834	2026-04-01
AS6079	Other IRR	MAINT-AS834	2026-08-31
AS6079	RIPE	netutils-mnt	2026-08-31
AS22773	RIPE	netutils-mnt	2026-04-01

Origin ASN

AS22773

ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc.

Related Prefixes

More prefixes of AS22773

All prefixes of AS22773 →

Geolocation

Country🇺🇸United StatesUS

CityChicago

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 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/51.19.128.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/51.19.128.0/17" | jq

External Links

RIPEstat