AS36136 — ALARMNET - ALARMNET

AS36136 announces 4 IPv4 prefixes covering 2,304 addresses and 0 IPv6 prefixes.

About this network

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.

Announced prefixes

• 12.149.218.0/24
• 131.201.236.0/23
• 198.140.154.0/23
• 204.141.56.0/22

Upstream networks

• AS46887 Crown Castle Fiber LLC
• AS7018 AT&T Enterprises, LLC
• AS54004 Cablevision Lightpath LLC

Adjacent networks

• AS46887 Crown Castle Fiber LLC
• AS7018 AT&T Enterprises, LLC
• AS54004 Cablevision Lightpath LLC

Routing security

• RPKI: 7 valid, 0 invalid and 1 not-found announcements; 6 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 19 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS23329:AS-CUSTOMERS, AS2914:AS-US, AS6128:AS-CUSTOMERS.