AS Data
AS4538| AS Number | 4538 |
|---|---|
| AS Name | ERX-CERNET-BKB |
| Organization | Tsinghua University() |
| Country | CN |
| Website | cernet.edu.cn |
| Number of IPv4 Routes | 5132 |
| Number of IPv6 Routes | 315 |
| ASN type | EDUCATION |
| Registry | APNIC |
| Date Allocated | N/A |
Use ASN data for AS4538 in automation: routing intelligence, peering analysis, ownership checks, and network observability.
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| Route | # IPs |
|---|---|
| 219.223.116.0/22 | 1024 |
| 211.82.160.0/20 | 4096 |
| 2001:250:588d::/48 | ~1×10²⁴ |
| 180.209.240.0/21 | 2048 |
| 210.45.95.0/24 | 256 |
| 210.37.88.0/21 | 2048 |
| 2001:250:5868::/48 | ~1×10²⁴ |
| 222.30.0.0/21 | 2048 |
| 222.203.92.0/23 | 512 |
| 2001:250:6028::/48 | ~1×10²⁴ |
% [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 2026-03-05 mnt-by: MAINT-CERNET-AP last-modified: 2026-03-05T06:39:56Z 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 2026-03-05 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2026-03-05T06:40:20Z 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 1.88.34 (WHOIS-UK2) # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # ASNumber: 4538 ASName: APNIC-4538 ASHandle: AS4538 RegDate: 2002-07-31 Updated: 2009-10-08 Comment: This AS number is not registered in the ARIN database. Comment: For details, refer to the APNIC Whois Database via Comment: WHOIS.APNIC.NET or http://wq.apnic.net/apnic-bin/whois.pl Ref: https://rdap.arin.net/registry/autnum/4538 ResourceLink: https://apps.db.ripe.net/db-web-ui/query ResourceLink: whois.apnic.net OrgName: Asia Pacific Network Information Centre OrgId: APNIC Address: PO Box 3646 City: South Brisbane StateProv: QLD PostalCode: 4101 Country: AU RegDate: Updated: 2012-01-24 Ref: https://rdap.arin.net/registry/entity/APNIC ReferralServer: whois://whois.apnic.net ResourceLink: http://wq.apnic.net/whois-search/static/search.html OrgAbuseHandle: AWC12-ARIN OrgAbuseName: APNIC Whois Contact OrgAbusePhone: +61 7 3858 3188 OrgAbuseEmail: search-apnic-not-arin@apnic.net OrgAbuseRef: https://rdap.arin.net/registry/entity/AWC12-ARIN OrgTechHandle: AWC12-ARIN OrgTechName: APNIC Whois Contact OrgTechPhone: +61 7 3858 3188 OrgTechEmail: search-apnic-not-arin@apnic.net OrgTechRef: https://rdap.arin.net/registry/entity/AWC12-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. #
| AS Number | Description | Country |
|---|---|---|
| AS9405 | Room 224, Tsinghua University | CN |
| AS4837 | China Unicom Backbone | CN |
| AS7660 | Asia Pacific Advanced Network - Japan | JP |
| AS24372 | CERNET2 IX at Harbin Institute of Technology | CN |
| AS8359 | MTS PJSC | RU |
| AS24352 | CERNET2 IX at Tianjin University | CN |
| AS139139 | Shenyang Agricultural University | CN |
| AS9808 | China Mobile Communications Group Co., Ltd. | CN |
| AS24371 | CERNET2 IX at Jilin University | CN |
| AS4134 | China Telecom Backbone | CN |
| AS Number | Description | Country |
|---|---|---|
| AS39120 | Convergenze S.p.A. | IT |
| AS6453 | TATA COMMUNICATIONS AMERICA INC | US |
| AS23911 | CNGI CERNET | CN |
| AS9304 | HGC Global Communications Limited | HK |
| AS9808 | China Mobile | CN |
| AS58453 | China Mobile International Limited | HK |
| AS140570 | Hong Kong Beecloud System Technology Services Limited | HK |
| AS8359 | MTS PJSC | RU |
| AS4635 | The Hong Kong Internet Exchange Limited | HK |
| AS7473 | Singapore Telecommunications SINGTEL Internet Exchange | SG |
| AS Number | Description | Country |
|---|---|---|
| AS9405 | Room 224, Tsinghua University | CN |
| AS23911 | CNGI CERNET | CN |
| AS24372 | CERNET2 IX at Harbin Institute of Technology | CN |
| AS24355 | CERNET2 IX at University of Electronic Science and Technology of China | CN |
| AS24348 | CERNET2 IX at Tsinghua University | CN |
| AS24350 | CERNET2 IX at Beijing University of Posts and Telecommunications | CN |
| AS24352 | CERNET2 IX at Tianjin University | CN |
| AS139139 | Shenyang Agricultural University | CN |
| AS24353 | CERNET2 IX at Xi'an Jiaotong University | CN |
| AS24371 | CERNET2 IX at Jilin University | CN |
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