Autonomous system
AS11608 ATG-11608
Hosting ARIN
Summary
Accretive Networks
hosting isp legacy
ATG-11608 is Accretive Networks, the network-operating entity of Seattle's Accretive Technology Group — the ARIN record gives the holder's address as 800 Stewart St, Seattle, the same downtown address as ATG, and the handle itself carries the parent's initials. ATG builds and runs large streaming and web-based video-chat platforms, so the AS exists primarily to serve that content.
What it's used for
Two things at once, which is why this network resists a single clean label. The self-registered blocks (ATG, ANI-001, ANI-002 — all org: Accretive Networks) carry the company's own platform and infrastructure; the sampled reverse DNS turns up ns2.accretive-networks.net, first-party nameservice on its own space. But the same AS also fronts legacy Pacific Northwest ISP space: 216.127.48.0/22 is registered to Cascadelink, and sampled PTRs on other blocks land in fciis.net (Fidalgo Networking, a Mount Vernon, WA ISP) and kwiky.com. Those are downstream regional networks riding Accretive's origin, not brokered address inventory — the registrants are named, findable Washington businesses, and the bulk of the space is self-registered with first-party rDNS.
Notable
RIS sees 43 announced v4 prefixes carrying 35,584 addresses, a single v6 /48 (2606:e600:ffff::/48), and 7 observed BGP neighbours. Almost every prefix is a /22 drawn from three legacy ranges — 207.66, 207.178, 216.127, plus some 207.246 — which reads as an accumulated ISP-era inventory rather than a modern allocation.
Interesting
The single announced /48 is a token IPv6 presence against 43 v4 prefixes: registered, routed, and evidently not yet where the traffic lives.
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 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 31 prefixes · 35.58K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 32 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11608- Registry name
- ATG-11608
- Registrant
- Accretive Networks
- Abuse contact
- abuse@accretive-networks.com
- Registered
- 2001-06-21
- Last changed
- 2018-10-31
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 45 with no ROA
- ROAs
- 0 authorising AS11608
- ASPA
- no ASPA record
- IRR
- 100% registered · 45 of 45 announcements
- Route objects
- 289 naming AS11608
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: 442 networks and 1,784 prefixes, as published 2026-10-19. 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