156.243.120.0/21

🇺🇸

CIDR

156.243.120.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

Houston

RIR

AFRINIC

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
156.243.120.0/21	AS11427TWC-11427-TEXAS - Charter Communications Inc	Valid	RADB	6/15/2026

Prefix	Origin	Max Length	Trust Anchor
156.243.120.0/21	AS11427	/24	afrinic
156.243.64.0/18	AS17561	/24	afrinic
156.243.0.0/16	AS17561	/24	afrinic

Origin	Registry	Maintainer	Modified
AS203020	AFRINIC	LARUS-SERVICE-MNT	-
AS11427	RADB	MAINT-LARUS	2/27/2026

Prefix	Country	Status
156.243.120.0/24	🇺🇸US	assigned
156.243.123.0/24	🇺🇸US	assigned
156.243.125.0/24	🇺🇸US	assigned
156.243.127.0/24	🇺🇸US	assigned
156.243.121.0/24	🇺🇸US	assigned
156.243.122.0/24	🇺🇸US	assigned
156.243.126.0/24	🇺🇸US	assigned
156.243.124.0/24	🇺🇸US	assigned

Origin ASN

Geolocation

Country🇺🇸United StatesUS

RegionTexas

CityHouston

API

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

curl -s "https://api.ipctl.io/v1/prefix/156.243.120.0/21" | jq

External Links