Home Prefix Lookup240c:c000::/20

240c:c000::/20 - China Next Generation Internet CERNET2 (AS23910)

IPv6APNICallocatedAS23910CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2No ROA

CIDR

240c:c000::/20

IP Version

IPv6

Addresses

324518553.6Y

Mask

/20

Country

🇨🇳 China

City

Haidian (Haidian Qu)

RIR

APNIC

Status

allocated

Allocated

2019-01-29

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
240c:c000::/20	AS23910 CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2	No ROA	APNIC	2026-10-27

More-Specific Announcements

138 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
240c:c000::/21	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-27
240c:c001::/32	AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University	Valid	-	2026-10-27
240c:c017::/32	AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University	Valid	-	2026-10-27
240c:c018::/32	AS24350 CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications	Valid	-	2026-10-27
240c:c019::/32	AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University	Valid	-	2026-10-27
240c:c02f::/32	AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University	Valid	-	2026-10-27
240c:c035::/32	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a0::/32	AS23910 CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2	Invalid	-	2026-10-27
240c:c0a1::/32	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	Valid	-	2026-10-27
240c:c0a1::/32	AS131490 CERT-Cor - CERNET Corporation	Valid	-	2026-10-27
240c:c0a2:200::/48	AS45576 CERNET2-TSINGHUA6-AS-AP - Tsinghua University	No ROA	-	2026-10-27
240c:c0a3:200::/48	AS45576 CERNET2-TSINGHUA6-AS-AP - Tsinghua University	No ROA	-	2026-10-27
240c:c0a4::/32	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	No ROA	-	2026-10-27
240c:c0a6::/48	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-27
240c:c0a8::/33	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a8::/34	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a8:3c82::/48	AS138370 CNGI-NCH-IX-AS-AP - CERNET2 regional IX at Nanchang University	Valid	-	2026-10-27
240c:c0a8:4000::/34	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a8:5c26::/48	AS24365 CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	Invalid	-	2026-10-27
240c:c0a8:5c49::/48	AS24366 CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	Valid	-	2026-10-27
240c:c0a8:8000::/33	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a8:8000::/34	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a8:9c01::/48	AS138440 CNGI-HAK-IX-AS-AP - CERNET2 regional IX at Hainan Normal University	Valid	-	2026-10-27
240c:c0a8:c000::/34	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	Valid	-	2026-10-27
240c:c0a9:1000::/40	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	Valid	-	2026-10-27
240c:c0a9:1000::/40	AS23910 CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2	Valid	-	2026-10-27
240c:c0a9:1000::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	Invalid	-	2026-10-27
240c:c0a9:1100::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1200::/40	AS133512 CERNEWTECH-ZHENGZHOU - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1300::/40	AS133513 CERNEWTECH-CHENGDU - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1400::/40	AS38587 CERNET-IDC-AP - CERNET Internet Data Center	No ROA	-	2026-10-27
240c:c0a9:1401::/48	AS38587 CERNET-IDC-AP - CERNET Internet Data Center	No ROA	-	2026-10-27
240c:c0a9:1600::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1700::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1800::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1900::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1a00::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1b00::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1c00::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0a9:1d00::/40	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0aa:1::/48	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0aa:2::/48	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0aa:101::/48	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0aa:102::/48	AS133111 CNT-northChina - CERNET New Technology Co., Ltd	No ROA	-	2026-10-27
240c:c0ad:66::/48	AS23910 CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2	No ROA	-	2026-10-27
240c:c0ad:464::/48	AS23910 CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2	No ROA	-	2026-10-27
240c:c118::/32	AS24348 CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University	No ROA	-	2026-10-27
240c:c220::/32	AS24352 CNGI-TJN-IX-AS-AP - CERNET2 IX at Tianjin University	Valid	-	2026-10-27
240c:c221::/32	AS24352 CNGI-TJN-IX-AS-AP - CERNET2 IX at Tianjin University	Valid	-	2026-10-27
240c:c246::/32	AS138375 CNGI-HHT-IX-AS-AP - CERNET2 regional IX at Inner Mongolia University	Valid	-	2026-10-27
240c:c283::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c286::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c288::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c28f::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c295::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c29f::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27
240c:c341::/32	AS138441 CNGI-WLQ-IX-AS-AP - CERNET2 regional IX at Xinjiang University	Valid	-	2026-10-27
240c:c381::/32	AS138377 CNGI-XNN-IX-AS-AP - CERNET2 regional IX at Qinghai Normal University	Valid	-	2026-10-27
240c:c406::/32	AS24369 CNGI-SY-IX-AS-AP - CERNET2 IX at Northeast University	Valid	-	2026-10-27
240c:c410::/32	AS24369 CNGI-SY-IX-AS-AP - CERNET2 IX at Northeast University	Valid	-	2026-10-27
240c:c586::/32	AS24372 CNGI-HRB-IX-AS-AP - CERNET2 IX at Harbin Institute of Technology	Valid	-	2026-10-27
240c:c602::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	Valid	-	2026-10-27
240c:c603::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	Valid	-	2026-10-27
240c:c604::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	Valid	-	2026-10-27
240c:c608::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	Valid	-	2026-10-27
240c:c64c::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	Valid	-	2026-10-27
240c:c651::/32	AS24361 CNGI-NJ-IX-AS-AP - CERNET2 IX at Southeast University	No ROA	-	2026-10-27
240c:c701::/32	AS24365 CNGI-SH-IX2-AS-AP - CERNET2 IX at Fudan University	Valid	-	2026-10-27
240c:c702::/32	AS24366 CNGI-SH-IX3-AS-AP - CERNET2 IX at Tongji University	Valid	-	2026-10-27
240c:c715::/32	AS24364 CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	Valid	-	2026-10-27
240c:c726::/32	AS24364 CNGI-SH-IX-AS-AP - CERNET2 IX at Shanghai Jiaotong University	Valid	-	2026-10-27
240c:c781::/32	AS24367 CNGI-HZH-IX-AS-AP - CERNET2 IX at Zhejiang University	Valid	-	2026-10-27
240c:c783::/32	AS24367 CNGI-HZH-IX-AS-AP - CERNET2 IX at Zhejiang University	Valid	-	2026-10-27
240c:c795::/32	AS24367 CNGI-HZH-IX-AS-AP - CERNET2 IX at Zhejiang University	Valid	-	2026-10-27
240c:c7b9::/32	AS24367 CNGI-HZH-IX-AS-AP - CERNET2 IX at Zhejiang University	Valid	-	2026-10-27
240c:c800::/21	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-27
240c:c803::/32	AS24362 CNGI-HEF-IX-AS-AP - CERNET2 IX at University of Science and Technology of China	Valid	-	2026-10-27
240c:c901::/32	AS138370 CNGI-NCH-IX-AS-AP - CERNET2 regional IX at Nanchang University	Valid	-	2026-10-27
240c:c981::/32	AS24355 CNGI-CD-IX-AS-AP - CERNET2 IX at University of Electronic Science and Technology of China	Valid	-	2026-10-27
240c:c983::/32	AS24355 CNGI-CD-IX-AS-AP - CERNET2 IX at University of Electronic Science and Technology of China	Valid	-	2026-10-27
240c:c99d::/32	AS24355 CNGI-CD-IX-AS-AP - CERNET2 IX at University of Electronic Science and Technology of China	Valid	-	2026-10-27
240c:ca02::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca03::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca04::/32	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	Valid	-	2026-10-27
240c:ca04::/32	AS132553 UPC-AS-CN - China University of Petroleum (East China)	Invalid	-	2026-10-27
240c:ca05::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca07::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca09::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca0b::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca0c::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca0d::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca0e::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca0f::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca10::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca11::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca12::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca13::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca14::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca15::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca18::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca19::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca1b::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca1d::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca21::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca23::/32	AS138371 CNGI-QDA-IX-AS-AP - CERNET2 regional IX at Ocean University of China	Valid	-	2026-10-27
240c:ca28::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca29::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca30::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca38::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	No ROA	-	2026-10-27
240c:ca43::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca47::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca48::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca49::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:ca49:8000::/33	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:caa1::/32	AS24363 CNGI-JNN-IX-AS-AP - CERNET2 IX at Shandong University	Valid	-	2026-10-27
240c:cb02::/32	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	Valid	-	2026-10-27
240c:cb06::/32	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	Valid	-	2026-10-27
240c:cb21::/32	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	Valid	-	2026-10-27
240c:cb3a::/32	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	Valid	-	2026-10-27
240c:cc02::/32	AS24358 CNGI-WH-IX-AS-AP - CERNET2 IX at Huazhong University of Science and Technology	Valid	-	2026-10-27
240c:cd01:cd01::/48	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cd05:cd05::/48	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cd15:1000::/48	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cd22::/32	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cd22:cd22::/48	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cd44::/32	AS138369 CNGI-SZH-IX-AS-AP - CERNET2 regional IX at Shenzhen University	Valid	-	2026-10-27
240c:cd45::/32	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cda1::/32	AS24357 CNGI-GZ-IX-AS-AP - CERNET2 IX at South China University of Technology	Valid	-	2026-10-27
240c:cda3::/32	AS138369 CNGI-SZH-IX-AS-AP - CERNET2 regional IX at Shenzhen University	Valid	-	2026-10-27
240c:ce04::/32	AS24359 CNGI-CHS-IX-AS-AP - CERNET2 IX at Central South University	Valid	-	2026-10-27
240c:ce81::/32	AS138393 CNGI-NAN-IX-AS-AP - CERNET2 regional IX at Guangxi University	Valid	-	2026-10-27
240c:ce83::/32	AS138438 CNGI-GLN-IX-AS-AP - CERNET2 regional IX at Guangxi Normal University	Valid	-	2026-10-27
240c:ce84::/32	AS138438 CNGI-GLN-IX-AS-AP - CERNET2 regional IX at Guangxi Normal University	Valid	-	2026-10-27
240c:ce89::/32	AS138438 CNGI-GLN-IX-AS-AP - CERNET2 regional IX at Guangxi Normal University	Valid	-	2026-10-27
240c:ceaa::/32	AS138393 CNGI-NAN-IX-AS-AP - CERNET2 regional IX at Guangxi University	Valid	-	2026-10-27
240c:cec1::/32	AS138440 CNGI-HAK-IX-AS-AP - CERNET2 regional IX at Hainan Normal University	Valid	-	2026-10-27
240c:cf81::/32	AS138378 CNGI-KMN-IX-AS-AP - CERNET2 regional IX at Yunnan University	Valid	-	2026-10-27
240c:cfc3::/32	AS24353 CNGI-XA-IX-AS-AP - CERNET2 IX at Xi'an Jiaotong University	Valid	-	2026-10-27

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS23910	APNIC	MAINT-CERNET-AP	2020-08-31

Origin ASN

AS23910

CNGI-CERNET2-AS-AP - China Next Generation Internet CERNET2

Related Prefixes

More prefixes of AS23910

All prefixes of AS23910 →

Geolocation

Country🇨🇳ChinaCN

RegionBeijing

CityHaidian (Haidian Qu)

Coordinates39.9997, 116.3260 ↗

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/240c:c000::/20

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

curl -s "https://api.ipctl.io/v1/prefix/240c:c000::/20" | jq

External Links

RIPEstat