Autonomous system
AS8001 COLOGIX
Hosting ARIN NSP
Summary
Cologix (Net Access)
hosting legacy
COLOGIX — the network of Cologix, Inc., a North American network-neutral colocation and interconnection company. This particular AS is the former Net Access Corporation (NAC) of Parsippany, New Jersey, which Cologix agreed to acquire in October 2015; the handle changed, the network did not.
What it's used for
- Colocation, dedicated servers and managed hosting out of Cologix's Northern New Jersey facilities, plus IP transit to the tenants in them.
- Interconnection: Cologix runs carrier-neutral meet-me rooms and exchange fabrics, so this AS peers widely rather than serving eyeballs.
Notable
- Every ARIN block behind it is still named
NAC-NETBLK*and registered to Cologix, Inc., and the reverse DNS that does exist resolves undernac.net— including the deadpanthis.ptr.is.named.in.honor.of.arin.nac.net. - ~55 announced IPv4 prefixes (roughly 430k addresses) with dozens of observed BGP neighbours, plus native IPv6 out of
2001:518::/32. That peer count is the signature of a datacentre and exchange operator, not an access ISP. - Addresses here are servers. There is no subscriber pool in the inventory: no
dsl-,pppoe-ordyn-reverse names anywhere in the space.
Interesting
- The
2001:518::/32allocation is an early one — NAC was routing production IPv6 well before most US hosting providers offered it.
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 8 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.69 |
| Toronto Internet Exchange | Toronto, Canada | 206.108.34.38 |
| DE-CIX New York | New York, United States | 206.82.104.16 |
| New York International Internet Exchange | New York, United States | 198.32.160.20 |
| DE-CIX Dallas | Dallas, United States | 206.53.202.8 |
| Equinix Internet Exchange New York | New York, United States | 198.32.118.157 |
| Digital Realty New York Internet Exchange | New York, United States | 206.126.115.44 |
| Ohio IX | Columbus, United States | 206.53.204.21 |
Transit providers
15 upstream, 22 downstream and 49 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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 175 prefixes · 426K addresses IPv6 19 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 194 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS8001- Registry name
- COLOGIX
- Registrant
- Cologix, Inc
- Abuse contact
- abuse@cologix.com
- Registered
- 1996-08-22
- Last changed
- 2022-04-20
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Cologix
- Also known as
- Cologix/NAC/Net Access Corporation
- Network type
- NSP
- Scope
- North America
- Traffic ratio
- Mostly Outbound
- Peering policy
- Selective
- IRR as-set
AS-NETACCESS- Present at
- 5 exchanges
- Facilities
- 10 facilities
- Website
- https://www.cologix.com
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, 59 with no ROA
- ROAs
- 1 authorising AS8001
- ASPA
- no ASPA record
- IRR
- 80% registered · 48 of 60 announcements 10 other origin
- Route objects
- 64 naming AS8001
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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