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help.duo.com
Cisco · tier critical (support / help) · 0.3% of the company's traffic weight · scan of 2026-10-17
AWS Route 53DNS (zone duo.com)
AWSEdge via Salesforce
AWS (AS16509)155.226.134.0/23
DNS records
| Status | live |
|---|---|
| CNAME chain | help.duo.com.00d70000000mjg8eac.live.siteforce.com → h.edge2.salesforce.com → st.edge.oregon.edge2.salesforce.com → st1.edge.sfdc-lywfpd.edge2.salesforce.com |
| A | 155.226.135.225 155.226.135.236 155.226.135.238 |
| 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 | 155.226.134.0/23 |
HTTP
| GET / status | 301 |
|---|---|
| /cdn-cgi/trace | no (404) |
| cf-ray | a4c032007869065f-SEA |
| location | https://help.duo.com/s/ |
| server | cloudflare |
| set-cookie(names) | CookieConsentPolicy, LSKey-c$CookieConsentPolicy |
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 Direct (AWS) · A 155.226.135.225 in 155.226.134.0/23 originated by AS16509 (confidence 80%)
History
| Scan | Status | DNS | Edge | CNAME / A | ASN |
|---|---|---|---|---|---|
| 2026-10-17 | live | AWS Route 53 | AWS | help.duo.com.00d70000000mjg8eac.live.siteforce.com > h.edge2.salesforce.com > st.edge.oregon.edge2.salesforce.com > st1.edge.sfdc-lywfpd.edge2.salesforce.com | AS16509 |
| 2026-10-17 | live | AWS Route 53 | AWS | help.duo.com.00d70000000mjg8eac.live.siteforce.com > h.edge2.salesforce.com > st.edge.oregon.edge2.salesforce.com > st1.edge.sfdc-lywfpd.edge2.salesforce.com | AS16509 |