Autonomous system
AS20340 CALLTOWER
Hosting ARIN
Summary
CallTower
business voip cloud telecom
The AS handle CALLTOWER is held by CallTower, Inc.
What it's used for
- The address space carries VoIP and unified communications infrastructure, evidenced by reverse DNS records pointing to
ptr.calltower.comand a single entry fornetwork.encore-insurance.com. - The AS announces 37,632 IPv4 addresses across 23 prefixes and maintains 99 observed neighbours, a ratio that indicates a business-oriented network providing connectivity for cloud-based telephony services rather than a residential access provider.
Notable
- Registrants for the majority of prefixes are listed as CallTower, Inc., while two prefixes (205.196.168.0/21 and 208.70.112.0/21) are registered to Straitshot Communications, Inc. under netnames beginning with
APPIA-NET. - The address inventory is composed of multiple /20 and /21 blocks, with the largest being 206.80.64.0/19, reflecting a consolidated corporate estate for a unified communications 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 7 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.14 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.214.181 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.237.177 |
| Coresite - Any2 West | Los Angeles, United States | 206.72.211.121 |
| Any2 California | Los Angeles, United States | 206.72.211.121 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.245 |
| Digital Realty Atlanta Internet Exchange | Atlanta, United States | 206.126.110.141 |
Transit providers
21 upstream, 1 downstream and 22 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 27 prefixes · 37.63K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 27 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS20340- Registry name
- CALLTOWER
- Registrant
- CallTower, Inc.
- Abuse contact
- ip-abuse@calltower.com
- Registered
- 2001-04-25
- Last changed
- 2025-11-21
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 20% valid · 4 valid, 16 with no ROA
- ROAs
- 4 authorising AS20340
- ASPA
- no ASPA record
- IRR
- 95% registered · 19 of 20 announcements 1 other origin
- Route objects
- 34 naming AS20340
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