Autonomous system
AS17621 CNCGROUP-SH - China Unicom Shanghai network
Unclassified APNIC
Summary
China Unicom Shanghai
telecom residential mobile china
CNCGROUP-SH is operated by China Unicom Shanghai.
What it's used for
- The address space carries netnames consistently labeled
UNICOM-SH, indicating a regional telecommunications provider serving Shanghai. - With 806,144 IPv4 addresses and 418 IPv6 prefixes announced against 50 observed neighbours, the high address-to-neighbour ratio suggests an access or eyeball network rather than a transit provider.
Notable
- All sampled registrants are
IRT-CU-CNwith netnameUNICOM-SH, which aligns with the AS handle and the operator's identity. - The inventory consists of 396 IPv4 prefixes, including large blocks such as 139.226.128.0/17 and 139.227.0.0/17, reflecting a substantial and finely subdivided address estate typical of a major carrier.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-03, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 421 prefixes · 805K addresses IPv6 416 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CN | China | 837 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS17621- Registry name
- CNCGROUP-SH
- Abuse contact
- hqs-ipabuse@chinaunicom.cn
- Registered
- 2008-09-04
- Last changed
- 2023-10-21
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 98% valid · 807 valid, 12 with no ROA 8 RPKI-invalid
- ROAs
- 783 authorising AS17621
- ASPA
- no ASPA record
- IRR
- 79% registered · 652 of 827 announcements 91 other origin
- Route objects
- 839 naming AS17621
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: 448 networks and 1,851 prefixes, as published 2026-11-04. 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