Companies › Cisco › DNS records › secure.cisco.com
secure.cisco.com
Cisco · tier critical (login / SSO) · 1.5% of the company's traffic weight · scan of 2026-10-17
Akamai Edge DNS + Self-hostedDNS (zone cisco.com)
CloudflareEdge
Cloudflare (AS13335)104.16.240.0/20
DNS records
| Status | live |
|---|---|
| CNAME chain | ssl.readmessl.com |
| A | 104.16.241.118 104.16.242.118 |
| AAAA | 2606:4700::6810:f176 2606:4700::6810:f276 |
| Zone | cisco.com |
| Zone NS | a28-64.akam.net a3-64.akam.net ns3.cisco.com ns2.cisco.com ns1.cisco.com |
| Origin ASN | AS13335 Cloudflare (AS13335) |
| BGP prefix | 104.16.240.0/20 |
HTTP
| GET / status | 200 |
|---|---|
| /cdn-cgi/trace | cloudflare (colo SEA) |
| cf-ray | a4c031f8ea5f065f-SEA |
| server | cloudflare |
| set-cookie(names) | __cf_bm |
Why we classified it this way
DNS
- Akamai Edge DNS Akamai Edge DNS · NS a28-64.akam.net, a3-64.akam.net (confidence 95%)
- Self-hosted Self-hosted · NS ns1.cisco.com → ? AS109 (company network), ns2.cisco.com → ? AS109 (company network), ns3.cisco.com → ? AS109 (company network) (confidence 90%)
Edge
- Cloudflare Cloudflare (IP range) · A 104.16.241.118 in published cloudflare ranges; /cdn-cgi/trace valid (colo=SEA) (confidence 99%)
Behind the edge / sub-signals
- Cloudflare Cloudflare Bot Management · cookie __cf_bm (confidence 90%)
History
| Scan | Status | DNS | Edge | CNAME / A | ASN |
|---|---|---|---|---|---|
| 2026-10-17 | live | Akamai Edge DNS Self-hosted | Cloudflare | ssl.readmessl.com | AS13335 |
| 2026-10-17 | live | Self-hosted Akamai Edge DNS | Cloudflare | ssl.readmessl.com | AS13335 |