Home Prefix Lookup202.121.0.0/16

202.121.0.0/16

🇨🇳

IPv4APNICallocatedMOASNo ROA

CIDR

202.121.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇨🇳 China

City

Haidian (Haidian Qu)

RIR

APNIC

Status

allocated

Allocated

9/21/1995

Announced BGP Routes

2 of 2 routes

MOAS - 2 origin ASNs

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
202.121.0.0/16	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.0.0/16	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026

Covering Prefix

92 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
202.120.0.0/15	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.112.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.48.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.64.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.192.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.224.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.96.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.128.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.0.0/20	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.112.0/20	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.0.0/20	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.48.0/20	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.192.0/20	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.64.0/20	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.96.0/20	AS24365CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	No ROA	—	5/31/2026
202.121.128.0/20	AS24365CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	No ROA	—	5/31/2026
202.121.192.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.176.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.160.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.168.0/21	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.160.0/21	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.176.0/21	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.168.0/21	AS24366CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	No ROA	—	5/31/2026
202.121.192.0/21	AS24366CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	No ROA	—	5/31/2026
202.121.28.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.20.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.148.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.252.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.180.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.176.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.16.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.240.0/22	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.148.0/22	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.240.0/22	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.176.0/22	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.180.0/22	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.16.0/22	AS24365CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	No ROA	—	5/31/2026
202.121.252.0/22	AS24366CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	No ROA	—	5/31/2026
202.121.20.0/22	AS24366CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	No ROA	—	5/31/2026
202.121.28.0/22	AS24366CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	No ROA	—	5/31/2026
202.121.246.0/23	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.96.0/23	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.244.0/23	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.246.0/23	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.244.0/23	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.96.0/23	AS24365CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	No ROA	—	5/31/2026
202.121.17.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.117.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.128.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.129.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.138.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.150.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.81.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.160.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.161.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.164.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.165.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.166.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.167.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.168.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.79.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.75.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.65.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.184.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.63.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.49.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.208.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.48.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.224.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.225.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.32.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.241.0/24	AS4538ERX-CERNET-BKB - China Education and Research Network Center	No ROA	—	5/31/2026
202.121.184.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.63.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.17.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.160.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.49.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.117.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.150.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.208.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.81.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.80.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.79.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.112.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.224.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.75.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.127.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.65.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.225.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.64.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.32.0/24	AS24364CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	No ROA	—	5/31/2026
202.121.128.0/24	AS24365CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	No ROA	—	5/31/2026

Origin ASNs (2)

AS4538MOAS

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

AS24364MOAS

CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University

Geolocation

Country🇨🇳ChinaCN

RegionBeijing

CityHaidian (Haidian Qu)

Coordinates39.9997, 116.3260 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/202.121.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/202.121.0.0/16" | jq

External Links

RIPEstat Hurricane Electric BGP