Autonomous system
AS18530 ISOMEDIA-1
Hosting ARIN
Summary
Isomedia
residential isp legacy broadband
The AS handle ISOMEDIA-1 is held by Isomedia, Inc.
What it's used for
- The address space carries residential broadband traffic, evidenced by reverse DNS entries such as
dsl-151-254.sea.blarg.netandhost-23-254.lax.gigabitnow.com, as well as netnames likeNET-SEANET-BLK-1andLEGACY-SWIFTV-BLOCK3. - With 64,256 IPv4 addresses announced across 71 prefixes and 34 observed neighbours, the ratio indicates an access network serving end-users rather than a transit provider.
Notable
- Registrants are predominantly Isomedia, Inc., though one prefix (64.38.180.0/22) is registered to GigabitNow Indiana, LLC, suggesting a subsidiary or acquired entity.
- The inventory includes legacy netnames referencing SeaNet and SwiftV, indicating the consolidation of older ISP infrastructure under the Isomedia brand.
- The address inventory is finely subdivided into numerous /22 and /23 blocks, consistent with site-by-site segmentation for a regional broadband provider.
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 |
|---|---|---|
| Seattle Internet Exchange | Seattle, United States | 206.81.80.79 |
| FD-IX - Indianapolis | Indianapolis, United States | 206.53.139.60 |
Transit providers
14 upstream, 12 downstream and 43 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 71 prefixes · 64.26K addresses IPv6 18 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 89 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS18530- Registry name
- ISOMEDIA-1
- Registrant
- Isomedia, Inc.
- Abuse contact
- abuse@isomedia.com
- Registered
- 2000-09-08
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 39% valid · 34 valid, 54 with no ROA
- ROAs
- 55 authorising AS18530
- ASPA
- no ASPA record
- IRR
- 93% registered · 82 of 88 announcements
- Route objects
- 107 naming AS18530
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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