Home Prefix Lookup223.2.0.0/15

223.2.0.0/15

🇨🇳

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

CIDR

223.2.0.0/15

IP Version

IPv4

Addresses

131K

Mask

/15 (255.254.0.0)

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
223.2.0.0/15	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	APNICRADB	6/13/2026

Covering Prefix

30 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
223.3.0.0/16	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.3.0.0/16	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.0.0/18	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.0.0/18	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.128.0/19	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.128.0/19	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.64.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.96.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.160.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.192.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.208.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.240.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.96.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.160.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.240.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.192.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.208.0/20	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.112.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.224.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.176.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.120.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.80.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.88.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.120.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.112.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.176.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.224.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.88.0/21	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026
223.2.178.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	6/13/2026
223.2.178.0/24	AS24361CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	—	6/13/2026

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/223.2.0.0/15

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

curl -s "https://api.ipctl.io/v1/prefix/223.2.0.0/15" | jq

External Links

RIPEstat Hurricane Electric BGP