Autonomous system
AS15121 CALTEL-COM
Unclassified ARIN
Summary
Calaveras Internet Company
isp telecom business
A single letter in front of the address so the label does not start with a digit.
What it's used for
- A rural internet provider. Two IPv4 prefixes and one IPv6
/32announced from the United States, with two observed BGP neighbours.
Notable
- Both sampled addresses answered, in the form
dsl-254.a66-102-155.caltel.us: the service type and final octet as one label, then the first three octets prefixed with a lonea. - The same shape appears across both blocks, so one convention covers space from two unrelated ranges.
- Both blocks carry the netname
CALTEL-NETWORKand are registered to the holder. - The AS handle and the netname both use a contraction ending in
TELwhile the registered company name says internet, so the abbreviation records what the business was before.
Interesting
- The stray letter is a workaround for a rule that host name labels should not begin with a digit. Several holders in this corpus solve it the same way, each picking a different letter, and none of them documents the choice anywhere. It is invisible until something tries to parse the address back out of the name and has to know to strip one character.
- Splitting the name into a host part and a network part, rather than flattening the whole address into one label, keeps the structure readable and makes the service type the first thing anyone sees.
- A
/32of IPv6 against five thousand IPv4 addresses is the standard rural provider allocation.
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 2026-10-16, 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 · 5.12K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15121- Registry name
- CALTEL-COM
- Registrant
- Calaveras Internet Company
- Abuse contact
- abuse@caltel.com
- Registered
- 2000-03-22
- Last changed
- 2014-01-28
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 18 valid, 0 with no ROA
- ROAs
- 3 authorising AS15121
- ASPA
- no ASPA record
- IRR
- 100% registered · 18 of 18 announcements
- Route objects
- 21 naming AS15121
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 1,783 prefixes, as published 2026-10-17. 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