AS20135 — MTL-19 - Millennium Telcom LLC

AS20135 announces 15 IPv4 prefixes covering 67,328 addresses and 2 IPv6 prefixes.

About this network

The AS handle MTL-19 is operated by Millennium Telcom LLC.

What it's used for

• The address space carries residential fiber broadband traffic, evidenced by reverse DNS records pointing to fiberfirstdns.com with state-specific subdomains such as az, tx, ca, and ne.
• The network announces 67,072 IPv4 addresses across 24 prefixes and 2 IPv6 prefixes, while maintaining only 5 observed routing neighbours, a ratio indicative of an access or eyeball network rather than a transit provider.

Notable

• Registrants for the largest prefixes include Millennium Telcom LLC, Cogent Communications LLC, and Ubiquity Nebraska LLC, with netnames such as MTL-CGNT-NET-2, COGENT-A, and UNLLC-CGNT-NET-1 reflecting historical acquisitions or space leases.
• The address inventory is subdivided into numerous /19, /20, and /21 blocks, consistent with a corporate estate segmented by geographic region or service tier.

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

Announced prefixes

• 38.3.16.0/20
• 38.13.96.0/19
• 38.48.32.0/19
• 38.186.100.0/22
• 38.186.104.0/22
• 38.186.108.0/23
• 38.186.112.0/20
• 38.187.32.0/19
• 38.248.64.0/21
• 38.248.72.0/23
• 38.248.74.0/24
• 38.248.76.0/23
• 66.182.192.0/18
• 68.71.64.0/20
• 149.120.64.0/19
• 2605:3480:1000::/36
• 2605:3480:2000::/36

Upstream networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS5056 Aureon Network Services
• AS46887 Crown Castle Fiber LLC

Downstream networks

• AS65101
• AS65001
• AS65003
• AS33589 City of Southlake
• AS65002 AS65002

Adjacent networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS5056 Aureon Network Services
• AS46887 Crown Castle Fiber LLC
• AS65101
• AS65003
• AS65001
• AS33589 City of Southlake
• AS65002 AS65002

Routing security

• RPKI: 0 valid, 0 invalid and 46 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 17% of announcements registered; 13 route objects.
• Listed in as-sets: AS-AUREON-TRANSIT, AS-CCF, AS-FRONTIER, AS-HURRICANE, AS-XO, AS-XO-B, AS13876:AS-CUSTOMERS, AS33589:AS-PEERS.