AS40401 — BACKBLAZE

Network type: hosting

AS40401 announces 8 IPv4 prefixes covering 9,216 addresses and 13 IPv6 prefixes.

About this network

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.com and netnames such as BACKB-7 and US-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.

Announced prefixes

• 45.11.36.0/22
• 104.153.232.0/21
• 149.137.128.0/21
• 149.137.136.0/22
• 149.137.140.0/23
• 149.137.142.0/24
• 206.190.208.0/21
• 207.166.148.0/24
• 2605:72c0:100::/45
• 2605:72c0:1fc::/46
• 2605:72c0:200::/44
• 2605:72c0:2fc::/46
• 2605:72c0:400::/45
• 2605:72c0:4fc::/46
• 2605:72c0:500::/45
• 2605:72c0:5fc::/46
• 2605:72c0:600::/44
• 2605:72c0:6fc::/46
• 2605:72c0:700::/45
• 2605:72c0:800::/45
• 2605:72c0:8fc::/46

Upstream networks

• AS1299 Arelion Sweden AB
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS812 Rogers Communications Canada Inc.
• AS24482 SG.GS
• AS293 ESnet
• AS50673 Serverius Holding B.V.
• AS1403 EBOX
• AS4637 Telstra Global
• AS42708 Glesys AB
• AS22652 Videotron Ltee
• AS37721 Virtual Technologies & Solutions
• AS29632 Netassist International EOOD
• AS394256 Tech Futures Interactive Inc.
• AS48362 Stadtwerke Feldkirch
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50300 CustodianDC Limited
• AS49559 A-Systems Sp. z o.o.
• AS48185 team.blue NV
• AS20473 The Constant Company, LLC
• AS2152 CENIC
• AS11164 Internet2
• AS213241 TECHIT.BE SRL
• AS17639 Converge ICT Solutions Inc.

Downstream networks

• AS396865 Backblaze Inc

Adjacent networks

• AS1299 Arelion Sweden AB
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS812 Rogers Communications Canada Inc.
• AS396865 Backblaze Inc
• AS24482 SG.GS
• AS293 ESnet
• AS50673 Serverius Holding B.V.
• AS1403 EBOX
• AS4637 Telstra Global
• AS42708 Glesys AB
• AS22652 Videotron Ltee
• AS29632 Netassist International EOOD
• AS37721 Virtual Technologies & Solutions
• AS394256 Tech Futures Interactive Inc.
• AS48185 team.blue NV
• AS48362 Stadtwerke Feldkirch
• AS49559 A-Systems Sp. z o.o.
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50300 CustodianDC Limited
• AS2152 CENIC
• AS20473 The Constant Company, LLC
• AS11164 Internet2
• AS213241 TECHIT.BE SRL

Internet exchanges

• AMS-IX Amsterdam — Amsterdam, Netherlands
• Equinix Internet Exchange Ashburn — Ashburn, United States
• Toronto Internet Exchange — Toronto, Canada
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• Nine IX — Paris, France