AS4538 China Education and Research Network Center
AS4538 (ERX-CERNET-BKB) is registered to China Education and Research Network Center in CN, through APNIC. It originates 5,896 prefixes in the global routing table.
Who holds AS4538
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
WHOIS recordAPNIC
% [whois.apnic.net] % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html % Information related to 'AS4538' % Abuse contact for 'AS4538' is 'abuse@cernet.edu.cn' aut-num: AS4538 as-name: ERX-CERNET-BKB descr: China Education and Research Network Center descr: Tsinghua University descr: Beijing 100084 country: CN remarks: This aut-num object created as part of remarks: the ER-Transfer from ARIN admin-c: CER-AP tech-c: CER-AP abuse-c: AC1685-AP mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-by: APNIC-HM mnt-irt: IRT-CERNET-AP last-modified: 2025-10-31T08:14:57Z source: APNIC irt: IRT-CERNET-AP address: Network Center, address: FIT-3-220, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 fax-no: +86-10-62785933 e-mail: abuse@cernet.edu.cn abuse-mailbox: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP auth: # Filtered remarks: timezone GMT+8 remarks: abuse@cernet.edu.cn was validated on 2026-09-10 mnt-by: MAINT-CERNET-AP last-modified: 2026-09-10T07:51:56Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Center, address: FIT-3-220, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 e-mail: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP nic-hdl: AC1685-AP remarks: Generated from irt object IRT-CERNET-AP remarks: abuse@cernet.edu.cn was validated on 2026-09-10 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2026-09-10T07:52:32Z source: APNIC role: CERNET Helpdesk address: CERNET Center address: Beijing 100084, China country: CN phone: +86-10-6278-4049 fax-no: +86-10-6278-5933 e-mail: helpdesk@cernet.edu.cn remarks: abuse@cernet.edu.cn admin-c: XL1-CN tech-c: SZ2-AP nic-hdl: CER-AP mnt-by: MAINT-CERNET-AP last-modified: 2020-09-03T09:14:12Z source: APNIC % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-US2)
What AS4538 announces
Prefixes originated by AS4538 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).
Announced prefixes
Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.
Show 2,880 more
Show 775 more
RPKI valid RPKI invalid no ROA covers it
The API returns the full list.
Who AS4538 is reached through
The AS just before AS4538 in the paths our looking glass collectors hold, for 60 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.
Routing registry objects
From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.
| Source | as-name | Maintained by |
|---|---|---|
| APNIC | ERX-CERNET-BKB | APNIC-HM |
Route objects with origin AS4538: RADB 4,583 · NTTCOM 4,394 · APNIC 1,733 · LEVEL3 8 · ALTDB 1 · ARIN 1