Autonomous system
AS54370 SKYWEST - SKYWEST AIRLINES, INC.
Unclassified ARIN
Summary
SkyWest Airlines
airline corporate business us
The AS handle SKYWEST is held by SkyWest Airlines, Inc.
What it's used for
- The address space carries corporate infrastructure, evidenced by the netname
SKYWEST-INCon the 199.101.76.0/24 prefix. - The AS announces 768 IPv4 addresses across 2 prefixes and maintains 2 observed neighbours, indicating a small, self-contained corporate network rather than a transit or access provider.
- Traffic from this AS consists of internal corporate systems, office workers, and operational endpoints for the airline's headquarters and administrative functions.
Notable
- Registrants align with the announcer; the 199.101.76.0/24 prefix is registered to SKYWEST AIRLINES, INC., while the 199.101.78.0/23 prefix shows a generic ARIN registrant entry.
- SkyWest, Inc. was established in 2005 as the holding company for SkyWest Airlines and Atlantic Southeast Airlines, following the purchase of ASA from Delta Air Lines.
- The inventory consists of two contiguous IPv4 blocks with no IPv6 announcements, reflecting a minimal footprint for a major carrier's corporate estate.
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 2026-10-31, 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 · 768 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS54370- Registry name
- SKYWEST
- Registrant
- SKYWEST AIRLINES, INC.
- Abuse contact
- arinpoc@skywest.com
- Registered
- 2012-01-31
- Last changed
- 2012-01-31
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 3 with no ROA
- ROAs
- 0 authorising AS54370
- ASPA
- no ASPA record
- IRR
- 33% registered · 1 of 3 announcements 1 other origin
- Route objects
- 2 naming AS54370
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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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