asn.dev

Autonomous system

AS47039 NGLI-11-47039

Unclassified APNIC

IPv4 addresses 512 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

National Guardian Life Insurance Company

United States of America · AI-generated

business insurance corporate

NGLI-11-47039 is operated by National Guardian Life Insurance Company.

What it's used for

  • The address space carries corporate infrastructure, evidenced by netnames ATT-NET-12-32-185-0 and MDTNWI-NATIONAL-TDSNET-NETBLK and reverse DNS entries pointing to tds.net static hosts.
  • The AS announces 512 IPv4 addresses across 2 prefixes with 3 observed neighbours, indicating a small, self-contained corporate network rather than a transit or access provider.
  • Traffic from this AS consists of office workers and internal business endpoints for an insurance company headquartered in Madison, Wisconsin.

Notable

  • Registrants for both announced prefixes are listed as NATIONAL GUARDIAN LIFE, matching the AS holder.
  • The company was formerly known as National Guardian Life Insurance Company and is now branded as NGL Insurance Company.
  • The inventory consists of two /24 blocks, one historically associated with AT&T and the other with MDTNWI, reflecting leased or acquired address space for corporate use.

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

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4181TDS TELECOM68
AS7018AT&T Enterprises, LLC27
AS40264Charter Communications LLC26

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS47039
Registry name
NGLI-11-47039
Registrant
National Guardian Life Insurance Company
Abuse contact
ARIN_ABUSE_POC@nglic.com
Registered
2009-06-09
Last changed
2023-03-09
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
50% valid · 1 valid, 1 with no ROA
ROAs
1 authorising AS47039
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS47039

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: 443 networks and 1,784 prefixes, as published 2026-10-19. 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