Home Prefix Lookup1.51.0.0/16

1.51.0.0/16

🇨🇳

IPv4APNICallocatedAS4538ERX-CERNET-BKB - China Education and Research Network CenterNo ROA

CIDR

1.51.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇨🇳 China

City

Nanjing

RIR

APNIC

Status

allocated

Allocated

7/12/2010

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
1.51.0.0/16	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	APNICRADB	5/31/2026

Covering Prefix

24 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
1.51.192.0/18	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.144.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.32.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.176.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.16.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.16.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	5/31/2026
1.51.32.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	5/31/2026
1.51.144.0/20	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.176.0/20	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.120.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.48.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.168.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.152.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.160.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.144.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.48.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	5/31/2026
1.51.120.0/21	AS24362CNGI-HEF-IX-AS-AP - CERNET2 IX at University of Science and Technology of China	No ROA	—	5/31/2026
1.51.152.0/21	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.144.0/21	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.160.0/21	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.168.0/21	AS141005SDEPN-AS-CN - Shandong Provincial Department of Education,	No ROA	—	5/31/2026
1.51.112.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.3.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
1.51.112.0/24	AS24362CNGI-HEF-IX-AS-AP - CERNET2 IX at University of Science and Technology of China	No ROA	—	5/31/2026

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4538	APNIC	MAINT-CERNET-AP	7/15/2010
AS4538	RADB	MAINT-AS4637	11/13/2023

Origin ASN

AS4538

ERX-CERNET-BKB - China Education and Research Network Center

Geolocation

Country🇨🇳ChinaCN

RegionJiangsu

CityNanjing

Coordinates32.0584, 118.7960 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/1.51.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/1.51.0.0/16" | jq

External Links

RIPEstat Hurricane Electric BGP