Autonomous system
AS19880 REALCOMPII
Unclassified ARIN
Summary
Realcomp II
business mls real-estate internal
The AS handle REALCOMPII is operated by Realcomp II Ltd., a Michigan-based Multiple Listing Service (MLS) provider.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by reverse DNS entries such as
pooln254.realcomp.com,poolb128.realcomp.com, andpoolc126.realcomp.com. - The network announces 1536 IPv4 addresses across 2 prefixes with only 2 observed neighbours, indicating a small, self-contained internal estate rather than a transit or access network.
Notable
- The registrant for both announced prefixes,
RCOMPII-BLK1, is listed as REALCOMP II LTD., which matches the AS holder exactly. - The address inventory consists of two contiguous blocks: 207.111.176.0/22 and 207.111.180.0/23, reflecting a finely subdivided corporate network.
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 2 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19880- Registry name
- REALCOMPII
- Registrant
- REALCOMP II LTD.
- Abuse contact
- KFRANKLIN@corp.realcomp.com
- Registered
- 2001-02-26
- Last changed
- 2012-05-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS19880
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 10 naming AS19880
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 1,784 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