Companies › Cisco › DNS records › go.duo.com
go.duo.com
Cisco · tier critical (marketing / brand) · 0.3% of the company's traffic weight · scan of 2026-10-17
AWS Route 53DNS (zone duo.com)
CloudflareEdge via Marketo
Cloudflare (AS13335)104.17.64.0/20
DNS records
| Status | live |
|---|---|
| CNAME chain | duosecurity-ssl.mktoweb.com → sj02.mktossl.com |
| A | 104.17.71.206 104.17.72.206 104.17.70.206 104.17.74.206 |
| 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 | AS13335 Cloudflare (AS13335) |
| BGP prefix | 104.17.64.0/20 |
HTTP
| GET / status | 500 |
|---|---|
| /cdn-cgi/trace | cloudflare (colo SEA) |
| cf-ray | a4c031fc8cd9065f-SEA |
| server | cloudflare |
| set-cookie(names) | BIGipServerACg6TF6MYytmpZ64rHWUcQ, __cf_bm |
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
- Cloudflare Cloudflare (IP range) · A 104.17.71.206 in published cloudflare ranges; /cdn-cgi/trace valid (colo=SEA) (confidence 99%)
Behind the edge / sub-signals
- F5 F5 BIG-IP LTM · cookie BIGipServerACg6TF6MYytmpZ64rHWUcQ (confidence 90%)
- Cloudflare Cloudflare Bot Management · cookie __cf_bm (confidence 90%)
History
| Scan | Status | DNS | Edge | CNAME / A | ASN |
|---|---|---|---|---|---|
| 2026-10-17 | live | AWS Route 53 | Cloudflare | duosecurity-ssl.mktoweb.com > sj02.mktossl.com | AS13335 |
| 2026-10-17 | live | AWS Route 53 | Cloudflare | duosecurity-ssl.mktoweb.com > sj02.mktossl.com | AS13335 |