Autonomous system
AS9617 ZAQ JCOM Co., Ltd.
Residential APNIC
Summary
J:COM (ZAQ)
isp residential legacy
AS9617 (ZAQ) is held by JCOM Co., Ltd., Japan's largest cable television and broadband operator. ZAQ is J:COM's consumer internet brand: the cable-ISP side of the company that sells J:COM NET alongside its TV, telephony and mobile bundles.
What it's used for
This is one of the larger eyeball networks in the range and the routing evidence is unambiguous. It announces 85 IPv4 prefixes covering 1,163,264 addresses, including four /15s (119.24.0.0/15, 49.250.0.0/15, 180.220.0.0/15, 122.196.0.0/15) and a long series of /16s and /17s, plus 33 IPv6 prefixes, mostly /37s carved from 2400:3800::. Every sampled address resolves under rev.zaq.ne.jp with hex-encoded per-address hostnames like zaq77180005 and zaqb4dc0005. That is machine-generated naming for an enormous pool of subscriber modems, generated from the address itself because no human is going to name a million cable customers.
The single observed BGP neighbour is the point that settles the role. Over a million addresses behind one upstream adjacency is a pure access network: it consumes transit rather than selling it, and it does not peer widely. All of that traffic is J:COM's own residential subscribers.
Notable
- The IPv6 plan is deliberately fine-grained, carving
2400:3800::into many /37s rather than announcing one aggregate. That is regional or headend-level segmentation of a national cable footprint. - J:COM's regional cable operations sit on separate ASNs. Its Oita network, for example, is AS9614. AS9617 is the ZAQ consumer platform.
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.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS9824 | JCOM Co., Ltd. | 6,203 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 19 prefixes · 1.16M addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 20 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9617- Registry name
- ZAQ
- Registered
- 1999-08-05
- Last changed
- 2022-02-18
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 118 valid, 0 with no ROA
- ROAs
- 20 authorising AS9617
- ASPA
- no ASPA record
- IRR
- 100% registered · 118 of 118 announcements
- Route objects
- 120 naming AS9617
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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