Autonomous system
AS19005 MOZGROUP-SMTP
Unclassified ARIN
Summary
J2 Global Ventures
smtp business infrastructure
The AS handle MOZGROUP-SMTP is held by J2 Global Ventures, LLC.
What it's used for
- The address space carries SMTP infrastructure, as evidenced by reverse DNS entries such as
mailer0.gate168.rs.smtp.comandmailer254.gate91.sl.smtp.com. - The AS announces 12288 IPv4 addresses across 2 prefixes with 2 observed neighbours, indicating a specialized service network rather than a general transit or access provider.
Notable
- Both announced prefixes,
192.40.160.0/19and74.91.80.0/20, list J2 Global Ventures, LLC as the registrant, matching the AS holder. - J2 Global, Inc. was an American technology holding company that provided Internet services before evolving into its current venture structure.
- The inventory consists of two distinct IPv4 blocks with no IPv6 prefixes, reflecting a legacy or specialized deployment focused on email delivery.
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 2026-10-14, 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 · 12.29K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19005- Registry name
- MOZGROUP-SMTP
- Registrant
- J2 Global Ventures, LLC
- Abuse contact
- abuse@campaigner.com
- Registered
- 2011-04-06
- Last changed
- 2022-12-05
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 11 valid, 0 with no ROA
- ROAs
- 11 authorising AS19005
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 11 naming AS19005
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 1,772 prefixes, as published 2026-10-15. 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