Autonomous system
AS11374 WORKSMART-NETWORK-BACKBONE
Unclassified ARIN
Summary
PanTerra Networks, Inc.
hosting enterprise legacy
WORKSMART-NETWORK-BACKBONE is PanTerra Networks, Inc., a San Jose, California provider of cloud communications — hosted PBX, unified communications (UCaaS) and contact-centre services delivered from its own data centres. The AS carries PanTerra's service platform, not customer access circuits.
What it's used for
RIS sees four IPv4 /24s — 208.77.4.0/24 through 208.77.7.0/24, 1,024 addresses — plus three IPv6 /48s from 2602:fe6f::/32, and five observed BGP neighbours. Small address count, modest peering, IPv6 present: that is a service platform, not an eyeball network and not a transit carrier.
Notable
The reverse DNS is the clearest evidence and it names the service, not customers. Sampled addresses resolve under wspbx.com — literally "WorkSmart PBX", the branding preserved in the AS handle — and each PTR carries an airport-style site tag: 208-77-7-5.sjc.wspbx.com, 208-77-6-5.iad.wspbx.com, 208-77-4-5.nam.wspbx.com. Those map to San Jose, Ashburn and a North-America anycast/generic label, so the four /24s are one /24 of platform per point of presence. That is how a multi-site SIP/media service is laid out: separate routable space per data centre so calls can be steered and each site withdrawn independently.
Interesting
All four prefixes are registered in ARIN to org PanTerra Networks, Inc. under the network WORKSMARTNETWORKBACKBONE — registrant, announcer and rDNS all agree, which is what a genuine operator looks like. Note the PBX in the hostnames describes the workload: voice servers, not phone lines into homes.
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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 1.02K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11374- Registry name
- WORKSMART-NETWORK-BACKBONE
- Registrant
- Panterra Networks, Inc.
- Abuse contact
- operations@panterranetworks.com
- Registered
- 2007-03-30
- Last changed
- 2018-04-06
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 7 authorising AS11374
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 12 naming AS11374
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: 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