Autonomous system
AS13876 FIBER-64
Unclassified ARIN
Summary
FiberLight
transit telecom infrastructure
Eighty neighbours, and more IPv6 prefixes than IPv4 ones, all carved out of a single parent.
What it's used for
- A fibre carrier. 24,832 addresses across 22 IPv4 prefixes, 37 IPv6 prefixes, and 80 observed BGP neighbours.
Notable
- Every IPv6 prefix begins
2607:8300, split into/44,/46,/47and/48pieces. - Netnames include
FIBER-64,FIBERLIGHT, and two carrier order numbers,GX-FRO2004544974andGX-FRO2004544992. - Those two differ by eighteen in their last digits, so they were issued from one counter.
- Other blocks belong to two different carriers under their own naming.
- Reverse names take the form
ip254.29.204.67.fiberlight.net, the address reversed with a marker fused to the first octet.
Interesting
- Eighty adjacencies against twenty-five thousand addresses is the ratio that identifies a carrier rather than an access network. The addresses are incidental; the business is the interconnections.
- Splitting one IPv6 parent into 37 announcements undoes the main advantage of the larger address space, which was supposed to let a carrier announce one block and route the rest internally. Each piece costs a slot in every table that carries a full IPv6 view.
- Sequential order numbers in netnames make two unrelated ranges provably part of one purchase.
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
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.237.253 |
| Tampa Internet Exchange | Tampa, United States | 206.108.114.32 |
Transit providers
7 upstream, 58 downstream and 74 adjacent networks observed; most-used upstreams first.
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 35 prefixes · 25.09K addresses IPv6 37 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 72 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13876- Registry name
- FIBER-64
- Registrant
- FiberLight, LLC
- Abuse contact
- NetworkEngineering@fiberlight.com
- Registered
- 2010-07-09
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 82% valid · 56 valid, 12 with no ROA
- ROAs
- 7 authorising AS13876
- ASPA
- no ASPA record
- IRR
- 100% registered · 68 of 68 announcements
- Route objects
- 75 naming AS13876
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 1,771 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