Autonomous system
AS11067 PTSINET
Residential ARIN
Summary
Panhandle Telecommunications Systems, Inc. (PTCI)
isp legacy
PTSINET belongs to Panhandle Telecommunications Systems, Inc. — the internet arm of PTCI, the rural telephone cooperative serving the Oklahoma Panhandle and the adjoining corners of Kansas, Texas and Colorado. It is a genuine last-mile ISP, and everything in its routing says so.
What it's used for
Residential and business broadband, video and voice for a sparsely populated rural service area. PTSI announces 21 IPv4 prefixes (20,480 addresses) drawn from three main ranges — 216.251.0.0/19, 65.79.192.0/19 and 67.219.160.0/20 — plus one IPv6 block, 2605:d800::/32.
The registrant names are the clearest evidence on the card, because PTCI has labelled its own sub-allocations by the access technology behind them: PTCIPPPOE for the 216.251.0.0/19 space (PPPoE — DSL and fibre subscriber sessions), PTCICBL for 67.219.160.0/20 (cable plant), and PTSIVDO for the 65.79.192.0/19 video range. Every prefix is registered to the operator itself, and reverse DNS is uniformly first-party: 216-251-0-5.ptsi.net, 67-219-168-5.ptsi.net, and so on across all three ranges. Self-registered space with per-address subscriber rDNS under the holder's own domain is the definition of a real access network, as opposed to an AS announcing leased address space.
Notable
RIS observes ten BGP neighbours — more than a single-homed enterprise, far fewer than a carrier. That is the profile of a well-run rural ISP that has bought diverse transit and picked up a few peers, not of a wholesale network.
Interesting
One sampled address in the video range, 65.79.192.5, resolves to cache.google.com. That is a Google Global Cache node sitting inside PTCI's own address space — content caching hardware that Google places inside eyeball networks with enough subscribers to make local delivery worthwhile. Its presence is independent confirmation that this AS terminates real end users rather than servers.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Dallas | Dallas, United States | 206.53.202.62 |
Transit providers
6 upstream, 0 downstream and 9 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 14 prefixes · 20.48K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 15 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11067- Registry name
- PTSINET
- Registrant
- Panhandle Telecommunications Systems, INC.
- Abuse contact
- noc@ptci.net
- Registered
- 1998-03-30
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 22 valid, 0 with no ROA
- ROAs
- 4 authorising AS11067
- ASPA
- no ASPA record
- IRR
- 100% registered · 22 of 22 announcements
- Route objects
- 26 naming AS11067
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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