Autonomous system
AS10801 REGIONS-ASN-1
Unclassified ARIN
Summary
Regions Financial Corporation
enterprise legacy
REGIONS-ASN-1 is the network of Regions Financial Corporation, the Birmingham, Alabama bank holding company behind Regions Bank, a large retail and commercial bank across the US South and Midwest. RIS sees 29 IPv4 prefixes carrying 23,808 addresses, no IPv6, and 3 observed neighbours.
What it's used for
Regions' own internet edge. The announcement set is unusually clean for a bank: essentially all of it comes out of 205.255.0.0/16, announced as one /19 (205.255.224.0/19) plus a long series of /22s and the /23s they split into. This is the bank's public infrastructure — online and mobile banking, branch and ATM backhaul, mail, partner and payment-network links, remote access — and none of it is resold.
Notable
Three neighbours against nearly 24,000 addresses is the classic enterprise fingerprint, and it is the number that settles the classification. A network this size that was in the transit business would peer with hundreds of ASes. Regions buys from a small number of upstreams for redundancy and carries nobody else's traffic. As with most US banks in this range, the entire footprint is IPv4; there is no IPv6 announcement at all.
Interesting
The deaggregation pattern is a traffic-engineering habit rather than a necessity. Announcing 205.255.100.0/22 and 205.255.100.0/23 together, or 205.255.24.0/22 alongside 205.255.24.0/23, adds nothing to reachability. It exists so specific sites can be steered onto specific upstreams, or so a scrubbing provider can pull a piece of the space during an attack without moving the whole aggregate.
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 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 17 prefixes · 23.81K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 17 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10801- Registry name
- REGIONS-ASN-1
- Registrant
- REGIONS FINANCIAL CORPORATION
- Abuse contact
- Eric.Twitchell@regions.com
- Registered
- 2001-11-08
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 29 with no ROA
- ROAs
- 0 authorising AS10801
- ASPA
- no ASPA record
- IRR
- 100% registered · 29 of 29 announcements
- Route objects
- 30 naming AS10801
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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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