AS11123 — UIA

Network type: residential

AS11123 announces 6 IPv4 prefixes covering 69,632 addresses and 4 IPv6 prefixes.

About this network

UIA is Ultimate Internet Access, Inc., a regional Southern California ISP established in 1996 and based in Wrightwood. It sells gigabit fibre-to-the-home to residents and fibre, fixed-wireless and VoIP services to businesses.

What it's used for

A real access network, and one of the larger ones in this range. RIS observes 59 announced IPv4 prefixes totalling 69,632 addresses and 7 IPv6 prefixes, headed by a /17 (66.146.0.0/17) and several /19s: 216.66.224.0/19, 206.251.64.0/19, 64.30.192.0/19, 66.59.224.0/19. Much of the prefix count is UIA announcing more-specifics out of its own aggregates — a /17 broken into /19s, /20s, /22s and /24s — which is routine traffic engineering for an ISP spreading subscribers across multiple head-ends.

Every prefix in the pack is registered to UIA's own ARIN objects (ULTIMATE-INT, UIA-NET-). Self-registered space plus first-party rDNS is the clean signature of a genuine operator.

Notable

The reverse DNS is unusually informative and it all lives under uia.net: mail.uia.net for the operator's own services, 5.static.48.uia.net for statically-assigned customer addresses, ca-uia-216-66-224-5.uia.net across the bulk of the space, and fiber-ie-206-251-64-5.uia.net on the newer fibre ranges. The ca- and site codes read as California location tags, and the fiber- prefix marks the fibre plant specifically.

That is an eyeball network's rDNS: per-address generated names on customer pools, not server or tenant hostnames.

Interesting

Nine observed BGP neighbours against ~70k addresses is the right ratio for an eyeball ISP. A wholesale carrier holding that much space would peer with hundreds of ASes; UIA takes a few upstreams and points its subscribers at them. The seven IPv6 prefixes — including a /36, a /40, a /44 and two /48s out of 2606:e500::/32 — show a network that has actually deployed v6 rather than merely holding an allocation.

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

Announced prefixes

• 64.30.192.0/19
• 66.59.224.0/19
• 66.146.0.0/17
• 66.181.144.0/20
• 206.251.64.0/19
• 216.66.224.0/19
• 2606:e500::/48
• 2606:e500:100::/47
• 2606:e500:400::/44
• 2606:e500:c000::/36

Upstream networks

• AS6939 Hurricane Electric LLC
• AS5650 Frontier Communications of America, Inc.
• AS46887 Crown Castle Fiber LLC
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS5650 Frontier Communications of America, Inc.
• AS46887 Crown Castle Fiber LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS

Routing security

• RPKI: 0 valid, 0 invalid and 64 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 9% of announcements registered; 25 route objects.
• Listed in as-sets: AS-ANY2-RS, AS-CCF, AS-CCF-TEST, AS-FRONTIER, AS-HURRICANE, AS-HURRICANEV6, AS-TRANSROUTE-SPEC, AS1421:AS-CUSTOMERS.

Internet exchanges

• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States