AS7011 — FRONTIER-AND-CITIZENS

Network type: residential

AS7011 announces 4 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

Autonomous System 7011 (FRONTIER-AND-CITIZENS) is one of the networks of Frontier Communications, a large US telephone and broadband carrier. The handle preserves the name of Citizens Communications, the utility company that renamed itself Frontier.

What it's used for

• Consumer and small-business fixed broadband. Reverse DNS across its prefixes is classic subscriber addressing under frontiernet.net — names like static-…dsl1.chi.il.frontiernet.net and …dr01.crvl.il.frontiernet.net.

Notable

• A true eyeball network: the addresses terminate on homes and small offices, not on servers, and the reverse names encode the serving town and state.
• Frontier grew largely by acquiring landline territory from other carriers, so its address space is a patchwork of blocks inherited from predecessor telcos — which is why one company shows up under several ASNs and several rDNS suffixes.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 74.39.134.0/24
• 74.40.44.0/24
• 74.44.1.0/24
• 173.84.233.0/24

Upstream networks

• AS5650 Frontier Communications of America, Inc.

Adjacent networks

• AS5650 Frontier Communications of America, Inc.