Autonomous system
AS6556 AIRGAPPED
Unclassified ARIN
Summary
Airgapped (AZSIGNSHOP LLC)
legacy
AIRGAPPED is a small independent network operating under the registrant AZSIGNSHOP LLC of Flagstaff, Arizona. Despite the registrant name, the network trades as airgapped and is run as a personal/hobbyist autonomous system rather than as part of a sign-making business.
What it's used for
AS6556 originates its own 66.248.232.0/23 plus four /24s out of 44.0.0.0/8, the AMPRNet range administered by Amateur Radio Digital Communications. Transit and peering come from Hurricane Electric, Packetframe and other small operators, and the AS is present at community internet exchanges including FCIX, ARIX and EVIX. There is no reverse DNS published on the announced space.
Notable
The registrant name is a trap. AZSIGNSHOP LLC is a real Flagstaff sign shop, but the ASN's technical contacts, abuse role and network branding are all airgapped, and the routing footprint is that of an enthusiast network, not a print business.
Networks like this one, holding a handful of /24s and peering at volunteer-run exchanges, do not fit the usual hosting/ISP/enterprise buckets. The presence of AMPRNet space alongside commercially registered space is a further sign of a hobbyist rather than a commercial operation.
The number is low but the registration is recent: ARIN shows AS6556 registered in 2019, so it was reissued, not held from the early internet.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Fremont Cabal Internet Exchange | Fremont, United States | 206.80.238.103 |
| Amateur Radio Internet Exchange | Fremont, United States | 44.190.42.4 |
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
IPv4 4 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS6556- Registry name
- AIRGAPPED
- Registrant
- AZSIGNSHOP LLC
- Abuse contact
- abuse@airgapped.io
- Registered
- 2019-08-28
- Last changed
- 2019-08-28
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 17% valid · 1 valid, 5 with no ROA
- ROAs
- 2 authorising AS6556
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 33 naming AS6556
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: 431 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