asn.dev

Autonomous system

AS7816 CTC

Unclassified ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Concurrent Technologies Corporation

United States · AI-generated

enterprise research legacy

CTC is Concurrent Technologies Corporation, an independent non-profit applied research and development organisation based in Johnstown, Pennsylvania.

What it's used for

  • The organisation's own network. It announces a single /24, whose visible reverse DNS is CTC's own hosts on ctc.com — internal service names, not customer or subscriber space.

Notable

  • Despite the defence-heavy client base, this is not a government AS. CTC is a private non-profit corporation that contracts with government agencies; the address space belongs to the corporation, and labelling it government would attribute a contractor's network to its customers.
  • The generic handle CTC is easy to mis-expand — several unrelated networks use the same three letters. The ARIN registrant and the ctc.com rDNS are what pin it to Concurrent Technologies.

Interesting

  • CTC began in 1987 as a subsidiary of the University of Pittsburgh Trust and became fully independent in 1994; its ARIN organisation record dates from 1991, older than the AS number itself, which was registered in January 1997.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS701Verizon Business44
AS26801Zito Media, L.P.15

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS7816
Registry name
CTC
Registrant
Concurrent Technologies Corporation
Abuse contact
noc@ctc.com
Registered
1997-01-21
Last changed
2025-05-06
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS7816
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS7816

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

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: 442 networks and 1,783 prefixes, as published 2026-10-20. 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

Cross-check