Autonomous system
AS15173 NEWMA-11
Unclassified ARIN
Summary
NewMarket Corporation
business enterprise
One registrant field holds two company names joined by a slash.
What it's used for
- A chemical company's network. Two IPv4 prefixes announced from the United States, no IPv6, and two observed BGP neighbours.
Notable
- The larger block is a
/16whose netname and registrant both name a predecessor company, not the holder announcing it. - The smaller block is registered to a field that joins the holder and that predecessor with a slash, putting two company names in one value where a parser expects one.
- That smaller block also carries the
UU-netname prefix of a carrier that no longer exists under that name, followed by the first three octets of the block. - Six addresses were queried for reverse DNS and none returned a name.
- Sixty-five thousand addresses sit behind two upstreams, almost all of them in the single
/16.
Interesting
- A slash-joined registrant is a human writing a note into a machine field. It says the block belongs to both entities, which is true and which no software can act on. Split it on the slash and you get two organisations that were only ever one.
- A whole
/16announced by a manufacturer is a survival from when large allocations were routine. It is worth far more today than it was when it was assigned, and the predecessor's name on it is the reason the record still shows the merger. - Both a retired carrier's netname prefix and a retired company's name persist here. The registry preserves history it was never designed to preserve.
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 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 65.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15173- Registry name
- NEWMA-11
- Registrant
- Newmarket Corporation
- Abuse contact
- brady.crone@newmarket.com
- Registered
- 2007-11-13
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS15173
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 2 naming AS15173
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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