Autonomous system
AS10004 AS-PHOENIX-J Phoenix Communications Inc.
Residential ARIN
Summary
Phoenix Communications Inc.
AS-PHOENIX-J is Phoenix Communications Inc. (フェニックスコミュニケーションズ), an internet provider headquartered in Chuo-ku, Sapporo, Hokkaido. It sells fibre, fixed-wireless (BWA) and VoIP under the PHOENIX CLUB / PXC brand, and also supplies backbone and address space to a set of affiliated regional operators.
What it's used for
Broadband access. The AS announces 11 IPv4 prefixes totalling 26,368 addresses and a single IPv6 /32, and every sampled address resolves into an access-network pattern: 210-185-144-005.rppp.jp and H05.N80b9d2.rppp.jp encode the address straight into the label, 133-247-128-5.nctv.co.jp is cable-subscriber naming, and Pa5.kwn.yamasemi.ne.jp is a session-concentrator name. Those per-address PTRs exist to give customer-premises equipment a hostname in bulk. Backbone, server and management space does not look like that.
Notable
An eyeball network, and the neighbour count agrees: 26,368 addresses against 23 observed BGP neighbours is an access ISP with a few upstreams and regional peering, not a wholesale carrier — a transit business of that size would carry hundreds of adjacencies.
Interesting
The rDNS spans several different company zones — rppp.jp, nctv.co.jp, yamasemi.ne.jp (CBBS Corporation), plus Phoenix's own phoenix-c.or.jp. That is not the address-broker silhouette; it is the shape of Phoenix's stated wholesale business, supplying connectivity and numbering to partner ISPs, cable operators and the Hokkaido broadband cooperative. Geolocate this space to Japanese households behind those retail brands, not to Phoenix's Sapporo office.
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
Recorded at 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.89.94 |
| JPIX Tokyo | Tokyo, Japan | 210.171.225.142 |
| BroadBand Internet eXchange Osaka | Osaka, Japan | 218.100.9.214 |
Transit providers
8 upstream, 1 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 11 prefixes · 26.37K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 12 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10004- Registry name
- AS-PHOENIX-J
- Registered
- 2000-04-27
- Last changed
- 2023-01-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 12 with no ROA
- ROAs
- 0 authorising AS10004
- ASPA
- no ASPA record
- IRR
- 33% registered · 4 of 12 announcements 1 other origin
- Route objects
- 14 naming AS10004
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 1,784 prefixes, as published 2026-10-19. 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