Autonomous system
AS13875 -Reserved AS-
Unclassified Spamhaus ASN-DROP ARIN
Summary
MxFiber
isp telecom business
Marked reserved in one source, and not one of its blocks is registered to the company announcing them.
What it's used for
- A fibre network operator. 1,536 addresses across three IPv4 prefixes, two observed BGP neighbours, and no IPv6 announced.
Notable
- The registry holder record names the company and gives the handle
AS13875-MX-FIBER. - The inventory's AS handle field instead reads
-Reserved AS-. 207.228.200.0/22is registered to one company, netnameUPSTART.- The two
/24s are registered to a second, both netnameHUDSON. - Neither registrant is the company the AS is held by.
- First seen in the routing archive on 2006-02-17, timestamped at midnight.
Interesting
- The reserved marker is the second instance of that contradiction in this range, which makes it a systematic gap in one source rather than a one-off. An AS actively announcing three blocks is not reserved by any reading.
- An operator whose entire announced space belongs to other companies is either carrying their traffic or has acquired the networks without updating the records. The registry cannot tell those apart, and that ambiguity is the normal state for small fibre operators that grow by absorbing each other.
- Two upstreams and no IPv6 puts the network's shape a decade behind its first-seen date.
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 4 prefixes · 1.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13875- Registry name
- AS13875-MX-FIBER
- Registrant
- MxFiber LLC
- Abuse contact
- support@mxfiber.com
- Registered
- 2025-03-19
- Last changed
- 2025-08-29
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 88% valid · 15 valid, 0 with no ROA 2 RPKI-invalid
- ROAs
- 14 authorising AS13875
- ASPA
- no ASPA record
- IRR
- 76% registered · 13 of 17 announcements 4 other origin
- Route objects
- 14 naming AS13875
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
On Spamhaus ASN-DROP Spamhaus lists this entire
network (associated domain mxfiber.com)
as controlled by, or hijacked for, cybercrime. Many operators null-route
everything it originates.
3 DROP matches Announced space overlapping the DROP prefix list.
| Announced | DROP entry | Record |
|---|---|---|
| 204.235.240.0/24 | 204.235.240.0/24 | SBL678355 |
| 204.235.242.0/24 | 204.235.242.0/24 | SBL678356 |
| 207.228.200.0/22 | 207.228.200.0/22 | SBL678358 |
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,771 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