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assets.duo.com
Cisco · tier critical (downloads / static) · 0.4% of the company's traffic weight · scan of 2026-10-17
AWS Route 53DNS (zone duo.com)
AWSEdge
AWS (AS16509)143.204.160.0/21
DNS records
| Status | live |
|---|---|
| CNAME chain | d1lxdwoew7cc5p.cloudfront.net |
| A | 143.204.160.71 143.204.160.96 143.204.160.103 143.204.160.33 |
| AAAA | — |
| Zone | duo.com |
| Zone NS | ns-1365.awsdns-42.org ns-1733.awsdns-24.co.uk ns-55.awsdns-06.com ns-932.awsdns-52.net |
| Origin ASN | AS16509 AWS (AS16509) |
| BGP prefix | 143.204.160.0/21 |
HTTP
| GET / status | 403 |
|---|---|
| /cdn-cgi/trace | not probed |
| cf-ray | a4c0320269d3065f-SEA |
| server | cloudflare |
| via | 1.1 0758a857b0f9c36d8cfe897182f568ce.cloudfront.net (CloudFront) |
| x-amz-cf-id | Jj3pxw65N_y__M9YOeBSj-vf5GZbPB5OrpsT26EtcPvrcf0Xza9QeA== |
| x-amz-cf-pop | SEA900-P9 |
| x-cache | Error from cloudfront |
Why we classified it this way
DNS
- AWS Route 53 AWS Route 53 · NS ns-1365.awsdns-42.org, ns-1733.awsdns-24.co.uk, ns-55.awsdns-06.com, ns-932.awsdns-52.net (confidence 95%)
Edge
- AWS AWS CloudFront · CNAME d1lxdwoew7cc5p.cloudfront.net; A 143.204.160.71 in published aws_cloudfront ranges; A 143.204.160.71 in 143.204.160.0/21 originated by AS16509; x-amz-cf-* / via CloudFront (confidence 99%)
History
| Scan | Status | DNS | Edge | CNAME / A | ASN |
|---|---|---|---|---|---|
| 2026-10-17 | live | AWS Route 53 | AWS | d1lxdwoew7cc5p.cloudfront.net | AS16509 |
| 2026-10-17 | live | AWS Route 53 | AWS | d1lxdwoew7cc5p.cloudfront.net | AS16509 |