asn.dev

Autonomous system

AS20419 NETBLK-DMRCOM - DMR Communications Inc.

Unclassified ARIN

IPv4 addresses 7.94K 7 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

DMR Communications

United States of America · AI-generated

residential isp legacy access

The AS handle NETBLK-DMRCOM is operated by DMR Communications Inc.

What it's used for

  • The address space carries customer premises equipment, evidenced by reverse DNS entries pointing to customer.dmrcom.com and netnames such as DMR-DSL and CUSTOMER-PREM.
  • The AS announces 7936 IPv4 addresses across 7 prefixes while maintaining only 2 observed neighbours, a ratio that indicates an access or eyeball network rather than a transit provider.

Notable

  • All registrants for the announced prefixes are DMR Communications Inc., matching the AS holder and confirming consistent ownership of the inventory.
  • The address inventory consists of a mix of /21, /22, and /24 blocks, including legacy ranges like 66.133.64.0/21 and 199.21.152.0/21, with no IPv6 prefixes currently announced.

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
AS3356Level 3 Parent, LLC338
AS20001Charter Communications Inc84

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, 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 7 prefixes · 7.94K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America7

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS20419
Registry name
NETBLK-DMRCOM
Registrant
DMR Communications Inc.
Abuse contact
sage@dmrcom.com
Registered
2007-01-11
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 7 valid, 0 with no ROA
ROAs
7 authorising AS20419
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
10 naming AS20419

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 1,854 prefixes, as published 2026-11-06. 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