asn.dev

Autonomous system

AS36136 ALARMNET - ALARMNET

Unclassified ARIN

IPv4 addresses 2.30K 4 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

AlarmNet

United States of America · AI-generated

security monitoring business residential

ALARMNET is the autonomous system for AlarmNet, a home security monitoring service.

What it's used for

  • The address space carries infrastructure for home security monitoring, evidenced by the netname ALARMNET-IPV4 and the reverse DNS record dnsc254.ademco.com (Ademco is a major manufacturer of security panels).
  • The AS announces 2304 IPv4 addresses across 4 prefixes with 3 observed neighbours, a ratio that suggests a specialized business or access network rather than a large-scale transit provider.

Notable

  • Registrants vary significantly across the announced prefixes: NTT America, Inc. and VIPAR hold 204.141.56.0/22, Resideo Technologies, Inc holds 131.201.236.0/23, ALARMNET holds 198.140.154.0/23, and AT&T Enterprises, LLC holds 12.149.218.0/24.
  • The address inventory includes space registered to major telecommunications and technology firms, indicating that AlarmNet operates within or alongside larger corporate networks, likely due to acquisitions or partnerships.
  • The inventory is a mix of small /23 and /24 blocks alongside a larger /22, reflecting a segmented corporate estate rather than a contiguous residential block.

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
AS46887Crown Castle Fiber LLC347
AS7018AT&T Enterprises, LLC108
AS54004Cablevision Lightpath LLC20

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-08, 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 4 prefixes · 2.30K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America4

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS36136
Registry name
ALARMNET
Registrant
ALARMNET
Abuse contact
sal.labarca@resideo.com
Registered
2005-09-13
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
88% valid · 7 valid, 1 with no ROA
ROAs
6 authorising AS36136
ASPA
no ASPA record
IRR
100% registered · 8 of 8 announcements
Route objects
19 naming AS36136

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: 455 networks and 1,854 prefixes, as published 2026-11-09. 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