Autonomous system
AS7503 AIR Air Internet Service Co.,Ltd.
Unclassified ARIN
Summary
AIRnet (Air Internet Service)
hosting isp legacy
AIR — Air Internet Service Co., Ltd. (エアネット / AIRnet), an Osaka provider that began as an ISP in 1996 and has since moved its centre of gravity to hosting, managed servers and cloud mail.
What it's used for
- Hosting and managed services: dedicated and managed servers, and the company's
ALL in Onebusiness mail platform, whose hosts resolve underaiomail.jp. - Legacy internet access: part of the space still carries subscriber pools named
pool-IP-ADDR.user.airnet.ne.jp, alongside blocks of sequentially numbered access-server hosts underairnet.ne.jp.
Notable
- A mixed network, which is why it resists a single label. About 16k IPv4 addresses split between hosting infrastructure, customer servers (some resolving to third-party corporate domains) and a residual access-customer pool. Neither "hosting" nor "residential" fully describes it; the hosting side is the larger and the current business.
- Small and regional. The low AS number reflects an early-1990s Japanese ISP cohort, not present-day scale.
Interesting
- The
aiomail.jprDNS is a neat example of the general rule that a network's product is usually visible in its reverse DNS long before it is visible in its registry record: nothing in the RIR data hints that this AS mostly runs a business email service.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.44 |
Transit providers
6 upstream, 0 downstream and 10 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 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 16.38K addresses IPv6 15 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 17 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS7503- Registry name
- AIR
- Registered
- 1997-03-03
- Last changed
- 2011-03-19
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 5 authorising AS7503
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 5 naming AS7503
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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