Autonomous system
AS40401 BACKBLAZE
Hosting APNIC
Summary
Backblaze
cloud storage infrastructure business
The AS handle BACKBLAZE is held by Backblaze Inc.
What it's used for
- The address space carries cloud storage infrastructure, evidenced by the reverse DNS record
s3.us-west-004.backblazeb2.comand netnames such asBACKB-7andUS-BACKBLAZE-20190426. - The network announces 9,216 IPv4 addresses across 8 prefixes and 37 IPv6 prefixes, while maintaining 119 observed neighbours. This ratio of modest address inventory against a high neighbour count indicates a transit-heavy role for a large-scale data center operator.
- Traffic from this AS consists of web and API endpoints for Backblaze's cloud object storage and backup services, serving business and consumer clients globally.
Notable
- All registrants for the announced prefixes are Backblaze Inc, fully agreeing with the AS holder.
- The address inventory is finely subdivided into multiple /21, /22, /23, and /24 blocks, consistent with an internal corporate estate segmented by site or service tier.
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 5 exchanges in 4 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.212.253 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.239.203 |
| Toronto Internet Exchange | Toronto, Canada | 206.108.34.50 |
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.116.147 |
| Nine IX | Paris, France | 185.1.14.38 |
Transit providers
37 upstream, 1 downstream and 54 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 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 9.22K addresses IPv6 35 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 43 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS40401- Registry name
- BACKBLAZE
- Registrant
- Backblaze Inc
- Abuse contact
- abuse@backblaze.com
- Registered
- 2020-08-20
- Last changed
- 2020-08-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 83 valid, 0 with no ROA
- ROAs
- 8 authorising AS40401
- ASPA
- no ASPA record
- IRR
- 100% registered · 83 of 83 announcements
- Route objects
- 117 naming AS40401
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: 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