Autonomous system
AS21554 CYBERLYNK
Hosting ARIN
Summary
CyberLynk
isp residential business wisconsin
The AS handle CYBERLYNK is held by Wisconsin CyberLynk Network, Inc.
What it's used for
- The address space carries residential and business internet access, evidenced by reverse DNS entries such as
static.38.39.187.254.cyberlynk.netandhost9.jobsinthetown.com. - With 32000 IPv4 addresses announced across 14 prefixes and only 7 observed neighbours, the high address-to-neighbour ratio indicates an access or eyeball network rather than a transit provider.
Notable
- Most registrants align with the announcer, specifically
Wisconsin CyberLynk Network, Inc., though38.23.32.0/19is registered toCogent Communications, LLCand209.236.224.0/20toHostDrive.Com. - The inventory consists of a mix of /19, /20, /21, and /22 blocks, with the largest being
38.23.32.0/19, alongside two /32 IPv6 prefixes.
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.
Transit providers
6 upstream, 1 downstream and 11 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 2026-10-30, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 15 prefixes · 32.26K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 17 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21554- Registry name
- CYBERLYNK
- Registrant
- Wisconsin CyberLynk Network, Inc.
- Abuse contact
- abuse@cyberlynk.net
- Registered
- 2001-05-23
- Last changed
- 2012-03-02
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- CYBERLYNK
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- Facilities
- 1 facilities
- Website
- https://www.cyberlynk.net/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 2% valid · 1 valid, 64 with no ROA
- ROAs
- 1 authorising AS21554
- ASPA
- no ASPA record
- IRR
- 100% registered · 65 of 65 announcements
- Route objects
- 80 naming AS21554
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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: 447 networks and 1,849 prefixes, as published 2026-10-30. 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