Home Prefix Lookup222.249.128.0/18

222.249.128.0/18 - CERNET2 IX At Beijing University Of Posts And Telecommunications (AS24350)

IPv4APNICannouncedAS24350CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and TelecommunicationsNo ROA

CIDR

222.249.128.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇨🇳 China

City

Beijing

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
222.249.128.0/18	AS24350 CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications	No ROA	-	2026-10-12

Related Announcements

2 less-specific, 21 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
222.249.128.0/17	AS4847 CNIX-AP - China Networks Inter-Exchange	No ROA	-	2026-10-12
222.249.128.0/17	AS24350 CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications	No ROA	-	2026-10-12
222.249.128.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.129.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.130.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.131.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.132.0/23	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.134.0/23	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.136.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.139.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.140.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.144.0/21	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.144.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.148.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.149.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.150.0/23	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.152.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.156.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.160.0/20	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.168.0/23	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.172.0/22	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.176.0/20	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12
222.249.176.0/24	AS4847 CNIX-AP - China Networks Inter-Exchange	Valid	-	2026-10-12

More Specific Prefixes

Prefix	AS	Country	Status
222.249.128.0/19		🇨🇳CN	allocated
222.249.128.0/25		🇨🇳CN	assigned
222.249.128.128/25		🇨🇳CN	assigned
222.249.129.0/25		🇨🇳CN	assigned
222.249.129.128/25		🇨🇳CN	assigned
222.249.130.0/25		🇨🇳CN	assigned
222.249.130.128/25		🇨🇳CN	assigned
222.249.131.0/25		🇨🇳CN	assigned
222.249.131.128/25		🇨🇳CN	assigned
222.249.132.0/25		🇨🇳CN	assigned
222.249.132.128/25		🇨🇳CN	assigned
222.249.133.0/25		🇨🇳CN	assigned
222.249.133.128/25		🇨🇳CN	assigned
222.249.134.0/25		🇨🇳CN	assigned
222.249.134.128/25		🇨🇳CN	assigned
222.249.135.0/25		🇨🇳CN	assigned
222.249.135.128/25		🇨🇳CN	assigned
222.249.136.0/25		🇨🇳CN	assigned
222.249.136.128/25		🇨🇳CN	assigned
222.249.137.0/25		🇨🇳CN	assigned
222.249.137.128/25		🇨🇳CN	assigned
222.249.138.0/25		🇨🇳CN	assigned
222.249.138.128/25		🇨🇳CN	assigned
222.249.139.0/25		🇨🇳CN	assigned
222.249.139.128/25		🇨🇳CN	assigned
222.249.140.0/25		🇨🇳CN	assigned
222.249.140.128/25		🇨🇳CN	assigned
222.249.141.0/25		🇨🇳CN	assigned
222.249.141.128/25		🇨🇳CN	assigned
222.249.142.0/25		🇨🇳CN	assigned
222.249.142.128/25		🇨🇳CN	assigned
222.249.143.0/25		🇨🇳CN	assigned
222.249.143.128/25		🇨🇳CN	assigned
222.249.144.0/25		🇨🇳CN	assigned
222.249.144.128/25		🇨🇳CN	assigned
222.249.145.0/25		🇨🇳CN	assigned
222.249.145.128/25		🇨🇳CN	assigned
222.249.146.0/25		🇨🇳CN	assigned
222.249.146.128/25		🇨🇳CN	assigned
222.249.147.0/25		🇨🇳CN	assigned
222.249.147.128/25		🇨🇳CN	assigned
222.249.148.0/25		🇨🇳CN	assigned
222.249.148.128/25		🇨🇳CN	assigned
222.249.149.0/25		🇨🇳CN	assigned
222.249.149.128/25		🇨🇳CN	assigned
222.249.150.0/25		🇨🇳CN	assigned
222.249.150.128/25		🇨🇳CN	assigned
222.249.151.0/25		🇨🇳CN	assigned
222.249.151.128/25		🇨🇳CN	assigned
222.249.152.0/25		🇨🇳CN	assigned
222.249.152.128/25		🇨🇳CN	assigned
222.249.153.0/25		🇨🇳CN	assigned
222.249.153.128/25		🇨🇳CN	assigned
222.249.154.0/25		🇨🇳CN	assigned
222.249.154.128/25		🇨🇳CN	assigned
222.249.155.0/25		🇨🇳CN	assigned
222.249.155.128/25		🇨🇳CN	assigned
222.249.156.0/25		🇨🇳CN	assigned
222.249.156.128/25		🇨🇳CN	assigned
222.249.157.0/25		🇨🇳CN	assigned
222.249.157.128/25		🇨🇳CN	assigned
222.249.158.0/25		🇨🇳CN	assigned
222.249.158.128/25		🇨🇳CN	assigned
222.249.159.0/25		🇨🇳CN	assigned
222.249.159.128/25		🇨🇳CN	assigned
222.249.160.0/20	AS4847	🇨🇳CN	allocated
222.249.160.0/25		🇨🇳CN	assigned
222.249.160.128/25		🇨🇳CN	assigned
222.249.161.0/25		🇨🇳CN	assigned
222.249.161.128/25		🇨🇳CN	assigned
222.249.162.0/25		🇨🇳CN	assigned
222.249.162.128/25		🇨🇳CN	assigned
222.249.163.0/25		🇨🇳CN	assigned
222.249.163.128/25		🇨🇳CN	assigned
222.249.164.0/25		🇨🇳CN	assigned
222.249.164.128/25		🇨🇳CN	assigned
222.249.165.0/25		🇨🇳CN	assigned
222.249.165.128/25		🇨🇳CN	assigned
222.249.166.0/25		🇨🇳CN	assigned
222.249.166.128/25		🇨🇳CN	assigned
222.249.167.0/25		🇨🇳CN	assigned
222.249.167.128/25		🇨🇳CN	assigned
222.249.168.0/25		🇨🇳CN	assigned
222.249.168.128/25		🇨🇳CN	assigned
222.249.169.0/25		🇨🇳CN	assigned
222.249.169.128/25		🇨🇳CN	assigned
222.249.170.0/25		🇨🇳CN	assigned
222.249.170.128/25		🇨🇳CN	assigned
222.249.171.0/25		🇨🇳CN	assigned
222.249.171.128/25		🇨🇳CN	assigned
222.249.172.0/25		🇨🇳CN	assigned
222.249.173.0/25		🇨🇳CN	assigned
222.249.173.128/25		🇨🇳CN	assigned
222.249.174.0/25		🇨🇳CN	assigned
222.249.174.128/25		🇨🇳CN	assigned
222.249.175.0/25		🇨🇳CN	assigned
222.249.175.128/25		🇨🇳CN	assigned
222.249.176.0/20	AS4847	🇨🇳CN	allocated

Transfer History

Registry transfers of 222.249.128.0/18, blocks inside it, or blocks containing it.

222.249.176.0/20Transfer · 2024-12-12
China Internet Network Information Center/bjenet
🇨🇳 CN APNIC
→
China Internet Network Information Center/BITCC
🇨🇳 CN APNIC
222.249.160.0/20Transfer · 2024-12-12
China Internet Network Information Center/bjenet
🇨🇳 CN APNIC
→
China Internet Network Information Center/BITCC
🇨🇳 CN APNIC
222.249.128.0/19Transfer · 2024-12-12
China Internet Network Information Center/bjenet
🇨🇳 CN APNIC
→
China Internet Network Information Center/BITCC
🇨🇳 CN APNIC

Date	Resource	From	To	Type
2024-12-12	222.249.176.0/20	China Internet Network Information Center/bjenet 🇨🇳 CN APNIC	China Internet Network Information Center/BITCC 🇨🇳 CN APNIC	Transfer
2024-12-12	222.249.160.0/20	China Internet Network Information Center/bjenet 🇨🇳 CN APNIC	China Internet Network Information Center/BITCC 🇨🇳 CN APNIC	Transfer
2024-12-12	222.249.128.0/19	China Internet Network Information Center/bjenet 🇨🇳 CN APNIC	China Internet Network Information Center/BITCC 🇨🇳 CN APNIC	Transfer

Origin ASN

AS24350

CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications

Related Prefixes

Covering prefix

222.249.128.0/17AS4847

More prefixes of AS24350

All prefixes of AS24350 →

Geolocation

Country🇨🇳ChinaCN

RegionBeijing

CityBeijing

Coordinates39.9042, 116.4070 ↗

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/222.249.128.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/222.249.128.0/18" | jq

External Links

RIPEstat