asn.dev

Autonomous system

AS21837 OPERASOFTWARE

Unclassified ARIN

IPv4 addresses 5.89K 8 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 1 recorded by PCH
Upstreams 3 1 downstream
Flagged prefixes 0 none

Summary

Opera Software Americas

United States of America · AI-generated

business enterprise browser vpn

OPERASOFTWARE is the autonomous system for Opera Software Americas LLC.

What it's used for

  • The address space is registered under the netname OPERA-US-V4 for all announced IPv4 prefixes, indicating a dedicated corporate estate for the browser company's US operations.
  • The AS announces 5888 IPv4 addresses across 8 prefixes and 2 IPv6 prefixes, while maintaining only 4 observed neighbours. This high address-to-neighbour ratio, combined with the single corporate registrant, identifies this as an internal corporate network rather than a transit or access provider.

Notable

  • All registrants in the RDAP data match the announcer, consistently listing Opera Software Americas LLC for every prefix.
  • The address inventory is finely subdivided into eight distinct IPv4 blocks within the 107.167.96.0/20 range, reflecting site-by-site or functional segmentation of the corporate estate.
  • The operator is the developer of the Opera web browser, which includes built-in VPN and ad-blocking features, aligning with the enterprise classification.

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

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
Equinix Internet Exchange AshburnAshburn, United States206.126.237.46

Transit providers

3 upstream, 1 downstream and 8 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6939Hurricane Electric LLC352
AS6461Zayo Bandwidth179
AS174Cogent Communications, LLC161

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

Shape and geography

IPv4 8 prefixes · 5.89K addresses IPv6 2 prefixes

CountryNamePrefixes
USUnited States of America10

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21837
Registry name
OPERASOFTWARE
Registrant
Opera Software Americas LLC
Abuse contact
abuse@opera.software
Registered
2013-10-04
Last changed
2013-10-04
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 12 valid, 0 with no ROA
ROAs
2 authorising AS21837
ASPA
no ASPA record
IRR
8% registered · 1 of 12 announcements
Route objects
1 naming AS21837

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

Cross-check