Autonomous system
AS15196 MDDOT
Unclassified ARIN
Summary
Maryland Department of Transportation
government infrastructure
A whole /16 behind one upstream, with nothing answering in reverse.
What it's used for
- A state transportation agency's network. A single IPv4
170.93.0.0/16announced from the United States, no IPv6, and one observed BGP neighbour.
Notable
- Sixty-five thousand addresses in one announcement, one of the largest single prefixes in this range.
- The netname, the AS handle and the registrant are all the same agency, with the handle and netname identical five-letter abbreviations.
- One observed neighbour carries the whole allocation.
- Three addresses were queried for reverse DNS and none returned a name.
- The routing history begins in 2008, long after the block was allocated.
Interesting
- A state agency holding a full legacy allocation is a survival of the era when public bodies asked for space and received it in blocks this size. It is worth a great deal now, and the agency is very unlikely to be using more than a fraction of it.
- Everything about the record is consistent, which is unusual, and it comes from a single organisation having filled in every field at once. Consistency here is a sign of a network that has never changed hands.
- A transportation department's network reaches traffic signals, variable message signs and roadside equipment. One upstream for all of it, and nothing answering in reverse to say which address does what, leaves a very quiet public record for infrastructure that is anything but.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS6059 | University System of Maryland | 429 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, 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 · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15196- Registry name
- MDDOT
- Registrant
- Maryland Department of Transportation
- Abuse contact
- mdotpocinfo@mdot.state.md.us
- Registered
- 2008-03-28
- Last changed
- 2015-07-21
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 7 with no ROA
- ROAs
- 0 authorising AS15196
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 7 naming AS15196
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 1,778 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