asn.dev

Autonomous system

AS20437 AS20437 - Nationwide Mutual Insurance Company

Unclassified ARIN

IPv4 addresses 1.02K 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Nationwide Mutual Insurance Company

United States of America · AI-generated

business insurance corporate

AS20437 is operated by Nationwide Mutual Insurance Company.

What it's used for

  • The address space is registered under the netname NATE for the 155.188.0.0/23 block, indicating a corporate internal network rather than public consumer access.
  • The AS announces 1024 IPv4 addresses across 2 prefixes with only 1 observed neighbour, a ratio consistent with a private corporate estate or internal business infrastructure.

Notable

  • The registrant for the 155.188.0.0/23 prefix is Nationwide Mutual Insurance Company, matching the AS holder, while the 204.145.192.0/23 prefix lists American Registry for Internet Numbers as the registrant.
  • The inventory consists of two /23 blocks, one of which is directly registered to the insurance company and the other to the registry, suggesting a mix of owned and potentially leased or legacy space.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS701Verizon Business218
AS20231Charter Communications Inc12

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 2 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS20437
Registry name
AS20437
Registrant
Nationwide Mutual Insurance Company
Abuse contact
IPADMIN@nationwide.com
Registered
2001-05-08
Last changed
2012-08-30
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 4 with no ROA
ROAs
0 authorising AS20437
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
6 naming AS20437

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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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

Cross-check