asn.dev

Autonomous system

AS133111 CNT-NORTHCHINA CERNET New Technology Co., Ltd

Unclassified APNIC

IPv4 addresses 25.86K 13 prefixes
IPv6 prefixes 13 counted as prefixes, not addresses
Countries 1 mostly CN
Exchanges 0 recorded by PCH
Upstreams 3 8 downstream
Flagged prefixes 0 none

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

3 upstream, 8 downstream and 11 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4538China Education and Research Network Center177
AS23910China Next Generation Internet CERNET293
AS9808China Mobile Communications Group Co., Ltd.25

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 13 prefixes · 25.86K addresses IPv6 13 prefixes

CountryNamePrefixes
CNChina26

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS133111
Registry name
CNT-northChina
Registrant
CERNET New Technology Co., Ltd
Abuse contact
yujj@cernet.com
Registered
2019-05-23
Last changed
2023-09-05
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
82% valid · 9 valid, 2 with no ROA
ROAs
68 authorising AS133111
ASPA
no ASPA record
IRR
82% registered · 9 of 11 announcements
Route objects
89 naming AS133111

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 432 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check