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Data as of Nov 8, 2026

121.192.0.0/15

No anonymizer space

China Education and Research Network Center

Announcement
this exact prefix
No RPKI
Announced by
AS4538
Type
Business

Residential-proxy exits

Proxy exits
54
0.04% of its addresses · listed by providers
Always-on exits
2
3.7% of its exits
Spread
9 of 512
/24s with at least one exit
Providers
41
selling exits here

/24s with the most always-on exits

/24Always-on exitsProxy exits
121.193.129.0/24131
121.193.172.0/2414
121.193.182.0/2408
121.193.184.0/2404
121.193.161.0/2403
121.192.174.0/2401
121.192.185.0/2401
121.193.165.0/2401
121.193.191.0/2401

Proxy providers listing exits

  • 2Captcha
  • Ake.net
  • BartProxies
  • BirdProxies
  • BottingTools
  • ByteProxies
  • Byteful
  • CliProxy
  • EnigmaProxy
  • FlashProxy
  • FlexyProxies
  • GSocks
  • Geonix
  • GonzoProxy
  • IPOasis
  • IPPeak
  • IPRoyal
  • Infatica
  • LemonLabs
  • LemonPrime
  • LightningProxies
  • MangoProxy
  • NextProxy
  • NodeMaven
  • NodeProxy
  • NovProxy
  • NovaProxy
  • PROXYWING_BASIC
  • Proxiware
  • Proxy-Seller
  • ProxyEmpire
  • ProxyHat
  • ProxyRack
  • Proxyma
  • RainProxy
  • SPYDERPROXY_PREMIUM
  • Shifter
  • VantageProxies
  • VibeProxies
  • VitalExclusive
  • VitalProxy

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsRPKI
121.192.0.0/14
since Nov 2017
AS4538Business84
2 always on
Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific

Announcements inside

Arrived
PrefixOriginTypeProxy exitsHolderRPKI
121.192.0.0/16
since Dec 2008
AS4538Business2China Education and Research Network
121.192.0.0/24AS4538BusinessChina Education and Research Network
121.192.2.0/24AS4538BusinessChina Education and Research Network
121.192.3.0/24AS4538BusinessChina Education and Research Network
121.192.4.0/22AS4538BusinessChina Education and Research Network
121.192.8.0/24AS4538BusinessChina Education and Research Network
121.192.9.0/24AS4538BusinessChina Education and Research Network
121.192.11.0/24AS4538BusinessChina Education and Research Network
121.192.12.0/24AS4538BusinessChina Education and Research Network
121.192.13.0/24AS4538BusinessChina Education and Research Network
121.192.16.0/21AS4538BusinessChina Education and Research Network
121.192.24.0/22
since Sep 18, 2026
AS4538BusinessChina Education and Research Network
121.192.30.0/23AS4538BusinessChina Education and Research Network
121.192.32.0/22AS4538BusinessChina Education and Research Network
121.192.36.0/22AS4538BusinessChina Education and Research Network
121.192.40.0/22AS4538BusinessChina Education and Research Network
121.192.44.0/22AS4538BusinessChina Education and Research Network
121.192.48.0/23AS4538BusinessChina Education and Research Network
121.192.50.0/23AS4538BusinessChina Education and Research Network
121.192.52.0/23AS4538BusinessChina Education and Research Network
121.192.56.0/22AS4538BusinessChina Education and Research Network
121.192.60.0/22AS4538BusinessChina Education and Research Network
121.192.64.0/20AS4538BusinessChina Education and Research Network
121.192.128.0/24AS4538BusinessChina Education and Research Network
121.192.129.0/24AS4538BusinessChina Education and Research Network
121.192.130.0/23AS4538BusinessChina Education and Research Network
121.192.132.0/24AS4538BusinessChina Education and Research Network
121.192.134.0/24AS4538BusinessChina Education and Research Network
121.192.137.0/24AS4538BusinessChina Education and Research Network
121.192.138.0/24AS4538BusinessChina Education and Research Network
121.192.160.0/19
since Sep 18, 2026
AS4538Business2China Education and Research Network
121.192.192.0/18AS4538BusinessChina Education and Research Network
121.193.0.0/16
since Feb 2007
AS4538Business52
2 always on
China Education and Research Network
121.193.64.0/20AS4538BusinessChina Education and Research Network
121.193.80.0/20AS4538BusinessChina Education and Research Network
121.193.96.0/22AS4538BusinessChina Education and Research Network
121.193.128.0/20AS4538Business31
1 always on
China Education and Research Network
121.193.144.0/21
since Sep 18, 2026
AS4538BusinessChina Education and Research Network
121.193.160.0/19AS4538Business21
1 always on
China Education and Research Network
121.193.192.0/20AS4538BusinessChina Education and Research Network
121.193.208.0/21AS4538BusinessChina Education and Research Network
121.193.216.0/23AS4538BusinessChina Education and Research Network
121.193.221.0/24AS4538BusinessChina Education and Research Network
121.193.222.0/24AS4538BusinessChina Education and Research Network
121.193.224.0/20AS4538BusinessChina Education and Research Network
121.193.240.0/21AS4538BusinessChina Education and Research Network
121.193.248.0/21AS4538BusinessChina Education and Research Network

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
121.192.0.0/1665,536SHR-CERNETChina Education and Research NetworkALLOCATED PORTABLESep 4, 2008abuse@cernet.edu.cn
121.193.0.0/1665,536BJR-CERNETChina Education and Research NetworkALLOCATED PORTABLESep 4, 2008abuse@cernet.edu.cn

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Registry

Holder

Organization
Not stated by the registry
Origin network

AS4538

CN
Name
China Education and Research Network Center
Type
Education
Registered
Aug 1, 2002
Domain
cernet.edu.cn
Website
www.edu.cn
Industry
Colleges, Universities, and Professional Schools
Spamhaus ASN-DROP
not listed