Autonomous system
AS11183 MHTC-NET - Mount Horeb Telephone Co
Residential ARIN
Summary
Mount Horeb Telephone Co (MHTC)
isp legacy
MHTC-NET belongs to Mount Horeb Telephone Company, a rural incumbent telephone company in Mount Horeb, Wisconsin that also sells broadband under the MHTC brand. The AS carries its subscriber network.
What it's used for
Residential and small-business broadband for a rural Wisconsin service area. RIS sees 21 IPv4 prefixes and roughly 12,288 addresses, no IPv6, and only four BGP neighbours — the profile of an eyeball network with a couple of transit providers, not a carrier.
Reverse DNS is unusually explicit about what the space carries. Almost every sampled address falls under mhtc.net in patterns like mthb-216-246-182-5.pppoe.dyn.mhtc.net, mthb-216-246-176-5.pppoe.sta.mhtc.net and mthb-216-180-198-5.isg.dyn.mhtc.net: a town prefix (mthb for Mount Horeb), the access method (PPPoE, or isg for the intelligent-services-gateway style session pool), and a dynamic/static marker. Those are customer sessions. The only non-subscriber name in the sample is mhcore-nrp2-gw.mhtc.net, a core gateway.
Notable
Every announced prefix in the pack is registered to MHTC's own ARIN handles (MHTC-1, MHTC-2), so the address space is genuinely the telco's rather than leased in from third parties.
The inventory is fragmented — a /19, a /20, and a long tail of /24s deaggregated out of those same supernets, which is a common (if untidy) traffic-engineering habit at small ILECs.
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 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 13 prefixes · 12.29K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 13 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11183- Registry name
- MHTC-NET
- Registrant
- Mount Horeb Telephone Co
- Abuse contact
- ip-admin@mhtc.net
- Registered
- 1998-05-11
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 26 with no ROA
- ROAs
- 0 authorising AS11183
- ASPA
- no ASPA record
- IRR
- 100% registered · 26 of 26 announcements
- Route objects
- 2 naming AS11183
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 448 networks and 1,851 prefixes, as published 2026-11-03. 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