ta.symcd.com - dns.ninja

ta.symcd.com

CNAMEmpki-ocsp.digicert.com
DNSSEC⚠️ Not signed

symcd.com

DNSSEC⚠️ Not signed
NSns20.digicertdns.com ⭐
NSns21.digicertdns.com
NSns22.digicertdns.com
NSns23.digicertdns.net
NSns24.digicertdns.net
NSns25.digicertdns.net
NSpdns196.ultradns.biz
NSpdns196.ultradns.com
NSpdns196.ultradns.net
NSpdns196.ultradns.org
SOAns20.digicertdns.comdns@digicertdns.com 2009-01-02 #76
📈 Tranco rank: #3,608

DigiCert PKI Infrastructure Domain

symcd.com is a critical Public Key Infrastructure (PKI) domain operated by DigiCert, one of the world's largest Certificate Authorities. The domain name derives from "Symantec Certificate Distribution" — a legacy from Symantec's Website Security business, which DigiCert acquired in 2017.

Purpose

This domain serves as infrastructure for SSL/TLS certificate validation services:

  • OCSP Responders — Online Certificate Status Protocol endpoints (e.g., s.symcd.com) that allow browsers to verify if a certificate has been revoked in real-time
  • CRL Distribution — Certificate Revocation List hosting for certificates that need offline revocation checking
  • Certificate Chains — Intermediate certificate distribution for trust chain validation

The domain's high traffic rank (Tranco #3,681) reflects its role in billions of daily certificate validation requests from web browsers worldwide.

DNS Infrastructure

  • Authoritative Nameservers: Redundant configuration using both UltraDNS (pdns196.ultradns.) and DigiCert's own DNS infrastructure (ns20-25.digicertdns.)
  • Primary Contact: dns@digicertdns.com
  • Subdomains: 52+ including s.symcd.com (OCSP), g.symcd.com, tc.symcd.com
  • DNSSEC: Not enabled
  • IPv4/IPv6: Dual-stack support on all nameservers

Technical Notes

The domain itself does not host a website — it exists purely for PKI operations. Subdomains like s.symcd.com resolve to DigiCert's OCSP infrastructure (pki-ocsp.digicert.com), handling certificate status queries for millions of Symantec-legacy and DigiCert-issued certificates still in use across the internet.

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DNS History

26 records (1 active, 25 former)

20162017201820192020202120222023202420252026A2.22.139.272001:4de0:4103:180::201a2001:4de0:4103:181::201a2001:559:19:9a::201a2001:559:19:a0::201a23.13.171.2723.4.187.2723.41.75.2723.43.75.2723.47.27.2723.49.139.2723.5.251.2723.52.91.2723.53.155.272600:1408:10:183::201a2600:1408:10:184::201a2600:1408:10:191::201a2600:140a:0:184::201a2600:140a:0:18e::201a2a02:26f0:105:182::201a2a02:26f0:105:18d::201a2a02:26f0:105:18e::201aCNAMEmpki-ocsp.digicert.come8218.dscb1.akamaiedge.netocsp-ds.ws.symantec.com.edgekey.netocsp.ws.symantec.com.edgekey.net
○A2.22.139.272015-08-19 → 2016-04-02 · 6 obs
● 2015-08-19 21:31:08
● 2015-12-16 22:58:46
○ 2016-01-12 03:50:14
● 2016-04-02 03:09:20
○ 2016-04-23 18:10:56
○ 2026-08-11 10:19:18
○A2001:4de0:4103:180::201a2016-05-01 → 2016-05-01 · 4 obs
○ 2016-04-26 22:19:56
● 2016-05-01 20:19:28
○ 2016-06-02 21:15:32
○ 2026-08-11 10:19:18
○A2001:4de0:4103:181::201a2016-05-01 → 2016-05-01 · 4 obs
○ 2016-04-26 22:19:56
● 2016-05-01 20:19:28
○ 2016-06-02 21:15:32
○ 2026-08-11 10:19:18
○A2001:559:19:9a::201a2016-04-26 → 2016-04-26 · 4 obs
○ 2016-04-23 18:10:56
● 2016-04-26 22:19:56
○ 2016-05-01 20:19:28
○ 2026-08-11 10:19:18
○A2001:559:19:a0::201a2016-04-26 → 2016-04-26 · 4 obs
○ 2016-04-23 18:10:56
● 2016-04-26 22:19:56
○ 2016-05-01 20:19:28
○ 2026-08-11 10:19:18
○A23.13.171.272015-08-19 → 2015-08-19 · 3 obs
● 2015-08-19 21:31:08
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A23.4.187.272016-11-28 → 2016-12-01 · 5 obs
○ 2016-08-17 14:13:16
● 2016-11-28 03:51:18
● 2016-12-01 05:30:20
○ 2016-12-02 08:05:42
○ 2026-08-11 10:19:18
○A23.41.75.272015-08-19 → 2015-08-19 · 3 obs
● 2015-08-19 21:31:08
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A23.43.75.272016-04-23 → 2016-04-23 · 4 obs
○ 2016-04-02 03:09:20
● 2016-04-23 18:10:56
○ 2016-04-26 22:19:56
○ 2026-08-11 10:19:18
○A23.47.27.272015-08-19 → 2016-01-12 · 4 obs
● 2015-08-19 21:31:08
● 2016-01-12 03:50:14
○ 2016-04-02 03:09:20
○ 2026-08-11 10:19:18
○A23.49.139.272015-08-19 → 2015-08-19 · 3 obs
● 2015-08-19 21:31:08
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A23.5.251.272015-08-19 → 2016-05-01 · 4 obs
● 2015-08-19 21:31:08
● 2016-05-01 20:19:28
○ 2016-06-02 21:15:32
○ 2026-08-11 10:19:18
○A23.52.91.272016-04-26 → 2016-12-02 · 10 obs
○ 2016-04-23 18:10:56
● 2016-04-26 22:19:56
○ 2016-05-01 20:19:28
● 2016-06-02 21:15:32
● 2016-08-17 14:13:16
○ 2016-11-28 03:51:18
○ 2016-12-01 05:30:20
● 2016-12-02 08:05:42
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A23.53.155.272015-08-19 → 2015-08-19 · 3 obs
● 2015-08-19 21:31:08
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A2600:1408:10:183::201a2016-01-12 → 2016-12-02 · 8 obs
○ 2015-12-16 22:58:46
● 2016-01-12 03:50:14
○ 2016-04-02 03:09:20
○ 2016-06-06 12:44:44
● 2016-08-17 14:13:16
● 2016-12-02 08:05:42
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A2600:1408:10:184::201a2016-01-12 → 2016-01-12 · 4 obs
○ 2015-12-16 22:58:46
● 2016-01-12 03:50:14
○ 2016-04-02 03:09:20
○ 2026-08-11 10:19:18
○A2600:1408:10:191::201a2016-08-17 → 2016-12-02 · 5 obs
○ 2016-06-06 12:44:44
● 2016-08-17 14:13:16
● 2016-12-02 08:05:42
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○A2600:140a:0:184::201a2016-06-02 → 2016-06-06 · 5 obs
○ 2016-05-01 20:19:28
● 2016-06-02 21:15:32
● 2016-06-06 12:44:44
○ 2016-08-17 14:13:16
○ 2026-08-11 10:19:18
○A2600:140a:0:18e::201a2016-06-02 → 2016-06-06 · 5 obs
○ 2016-05-01 20:19:28
● 2016-06-02 21:15:32
● 2016-06-06 12:44:44
○ 2016-08-17 14:13:16
○ 2026-08-11 10:19:18
○A2a02:26f0:105:182::201a2015-12-16 → 2015-12-16 · 4 obs
○ 2015-08-19 21:31:08
● 2015-12-16 22:58:46
○ 2016-01-12 03:50:14
○ 2026-08-11 10:19:18
○A2a02:26f0:105:18d::201a2015-12-16 → 2016-04-23 · 7 obs
○ 2015-08-19 21:31:08
● 2015-12-16 22:58:46
○ 2016-01-12 03:50:14
● 2016-04-02 03:09:20
● 2016-04-23 18:10:56
○ 2016-04-26 22:19:56
○ 2026-08-11 10:19:18
○A2a02:26f0:105:18e::201a2016-04-02 → 2016-04-23 · 5 obs
○ 2016-01-12 03:50:14
● 2016-04-02 03:09:20
● 2016-04-23 18:10:56
○ 2016-04-26 22:19:56
○ 2026-08-11 10:19:18
○CNAMEe8218.dscb1.akamaiedge.net2015-12-16 → 2016-12-02 · 5 obs
○ 2015-08-19 21:31:08
● 2015-12-16 22:58:46
● 2016-12-02 08:05:42
○ 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
●CNAMEmpki-ocsp.digicert.com2026-08-11 → 2026-08-11 · 2 obs
○ 2018-08-22 13:14:14
● 2026-08-11 10:19:18
○CNAMEocsp-ds.ws.symantec.com.edgekey.net2015-12-16 → 2018-08-22 · 4 obs
○ 2015-08-19 21:31:08
● 2015-12-16 22:58:46
● 2018-08-22 13:14:14
○ 2026-08-11 10:19:18
○CNAMEocsp.ws.symantec.com.edgekey.net2015-08-19 → 2015-08-19 · 3 obs
● 2015-08-19 21:31:08
○ 2015-12-16 22:58:46
○ 2026-08-11 10:19:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
symcd.compdns196.ultradns.com, pdns196.ultradns.net, pdns196.ultradns.org, pdns196.ultradns.biz...8 records

✅ Authoritative Response

Server:156.154.64.196

NS records: pdns196.ultradns.com, pdns196.ultradns.net, pdns196.ultradns.org, pdns196.ultradns.biz, ns20.digicertdns.com, ns21.digicertdns.com, ns22.digicertdns.com, ns24.digicertdns.net, ns25.digicertdns.net, ns23.digicertdns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for symcd.com (unsigned zone)

⏱️ Timing

Total: 347ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1mpki-ocsp.digicert.com

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (pdns196.ultradns.com, pdns196.ultradns.com, ns20.digicertdns.com...)