Autonomous system
AS20234 HNTB
Unclassified APNIC
Summary
HNTB Corporation
business corporate design infrastructure
The AS handle HNTB is held by HNTB Corporation, an American architectural and infrastructure design firm.
What it's used for
- The address space is registered under netnames
NETBLK-HNTBandNETBLK-HNTB2, indicating a corporate internal network rather than a public service provider. - The AS announces 2560 IPv4 addresses across 6 prefixes with only 3 observed neighbours, a ratio consistent with a private corporate estate with limited external peering.
Notable
- All registrants in the RDAP data are listed as HNTB Corporation, matching the AS holder.
- HNTB is a major engineering and design firm, not a telecommunications carrier, explaining the lack of consumer-facing reverse DNS records.
- The inventory consists of two /23 blocks and two /24 blocks in the 198.51 and 198.99 ranges, all located in the United States.
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 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 2.56K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 6 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS20234- Registry name
- HNTB
- Registrant
- HNTB CORPORATION
- Abuse contact
- tgtelecom@hntb.com
- Registered
- 2001-04-10
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS20234
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 9 naming AS20234
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 1,772 prefixes, as published 2026-10-15. 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