Autonomous system
AS11123 UIA - Ultimate Internet Access, Inc
Residential ARIN Cable/DSL/ISP
Summary
Ultimate Internet Access, Inc
isp legacy
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Coresite - Any2 West | Los Angeles, United States | 206.72.210.218 |
| Any2 California | Los Angeles, United States | 206.72.210.218 |
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
IPv4 73 prefixes · 69.63K addresses IPv6 4 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 77 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11123- Registry name
- UIA
- Registrant
- Ultimate Internet Access, Inc
- Abuse contact
- krhodes@uia.net
- Registered
- 1998-04-17
- Last changed
- 2012-03-02
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Ultimate Internet Access
- Also known as
- UIA
- Network type
- Cable/DSL/ISP
- Scope
- North America
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- Present at
- 1 exchanges
- Facilities
- 1 facilities
- Website
- http://www.uia.net
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 64 with no ROA
- ROAs
- 1 authorising AS11123
- ASPA
- no ASPA record
- IRR
- 100% registered · 64 of 64 announcements
- Route objects
- 25 naming AS11123
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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