Autonomous system
AS13516 CTCA1336
Unclassified APNIC
Summary
Cancer Treatment Centers of America
business enterprise media
The netname declares the block a DMZ, and the one address answering is a beta version of a marketing site.
What it's used for
- A hospital operator's network. 512 addresses in one IPv4 prefix,
198.160.208.0/23, two observed BGP neighbours, and no IPv6 announced.
Notable
- The block is netname
CTCA-DMZ, registered to the company. - One sampled address answers as
beta.prostatepeptalk.com, a domain unrelated to the company's name. - The AS handle is
CTCA1336, initials followed by four digits.
Interesting
- A DMZ is the network between the inside and the internet, where anything the public touches lives. Saying so in the registry is honest and it is also a signpost: it tells anyone reading that everything here is by design exposed, and that whatever is worth protecting is somewhere else.
- A patient awareness campaign running as a separate domain, on the hospital's own DMZ, with a beta hostname still resolving, is how marketing sites accumulate. Each campaign gets a domain, the campaign ends, and the host record stays until somebody has a reason to remove it.
- Publishing a beta hostname is a small leak. Pre-release versions of a site are exactly what an interested party looks for, and reverse DNS hands over the name without anyone having to guess it.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS13516- Registry name
- CTCA1336
- Registrant
- Cancer Treatment Centers of America, Inc.
- Abuse contact
- networkadmins@ctca-hope.com
- Registered
- 2013-02-15
- Last changed
- 2013-02-15
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS13516
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 5 naming AS13516
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 1,781 prefixes, as published 2026-10-16. 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