Home Prefix Lookup221.239.57.0/24

221.239.57.0/24 - ASN For TIANJIN Provincial Net Of CT (AS17638)

IPv4APNICannouncedAS17638CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT RPKI Valid

CIDR

221.239.57.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇨🇳 China

City

Dawangzhuang (Hedong Qu)

RIR

APNIC

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
221.239.57.0/24	AS17638 CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT	Valid	Other IRR	2026-10-12

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
221.239.0.0/18	AS17638 CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
221.239.57.0/24	AS17638	/24	apnic
221.239.0.0/18	AS17638	/18	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS17638	Other IRR	MAINT-CT-GNOC	2023-11-13

More Specific Prefixes

Prefix	Country	Status
221.239.57.0/27	🇨🇳CN	assigned
221.239.57.32/29	🇨🇳CN	assigned
221.239.57.40/29	🇨🇳CN	assigned
221.239.57.48/29	🇨🇳CN	assigned
221.239.57.56/29	🇨🇳CN	assigned
221.239.57.64/30	🇨🇳CN	assigned
221.239.57.68/30	🇨🇳CN	assigned
221.239.57.72/29	🇨🇳CN	assigned
221.239.57.80/29	🇨🇳CN	assigned
221.239.57.88/29	🇨🇳CN	assigned
221.239.57.104/29	🇨🇳CN	assigned
221.239.57.116/30	🇨🇳CN	assigned
221.239.57.120/29	🇨🇳CN	assigned
221.239.57.128/29	🇨🇳CN	assigned
221.239.57.136/29	🇨🇳CN	assigned
221.239.57.144/29	🇨🇳CN	assigned
221.239.57.152/29	🇨🇳CN	assigned
221.239.57.164/30	🇨🇳CN	assigned
221.239.57.168/29	🇨🇳CN	assigned
221.239.57.176/30	🇨🇳CN	assigned
221.239.57.180/30	🇨🇳CN	assigned
221.239.57.184/29	🇨🇳CN	assigned
221.239.57.192/29	🇨🇳CN	assigned
221.239.57.200/29	🇨🇳CN	assigned
221.239.57.208/29	🇨🇳CN	assigned
221.239.57.216/29	🇨🇳CN	assigned
221.239.57.224/29	🇨🇳CN	assigned
221.239.57.232/29	🇨🇳CN	assigned
221.239.57.240/28	🇨🇳CN	assigned

Origin ASN

AS17638

CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT

Related Prefixes

Covering prefix

221.239.0.0/18AS17638

More prefixes of AS17638

All prefixes of AS17638 →

Geolocation

Country🇨🇳ChinaCN

RegionTianjin

CityDawangzhuang (Hedong Qu)

Coordinates39.1296, 117.2180 ↗

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 APNIC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/221.239.57.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/221.239.57.0/24" | jq

External Links

RIPEstat