su.symcd.com - dns.ninja

su.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: #3,604

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.

Same first word

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DNS History

53 records (1 active, 52 former)

20162017201820192020202120222023202420252026A2.22.139.272001:418:143c:180::201a2001:418:143c:18b::201a2001:4de0:2103:18c::201a2001:4de0:2103:190::201a2001:4de0:4103:180::201a2001:4de0:4103:181::201a2001:5000:1101:187::201a2001:5000:1101:188::201a2001:559:19:83::201a2001:559:19:a0::201a2001:590:1009:186::201a2001:590:1009:18d::201a2001:590:100b:185::201a2001:590:100b:187::201a2001:590:200a:286::201a2001:590:200a:299::201a23.15.155.2723.37.139.2723.4.187.2723.43.75.2723.44.155.2723.47.27.2723.49.139.2723.5.251.2723.50.75.2723.50.91.2723.52.59.2723.52.91.2723.53.155.2723.61.75.2723.7.139.272600:1406:13:285::201a2600:1406:13:291::201a2600:1408:10:183::201a2600:1408:10:184::201a2600:1408:10:191::201a2600:1408:10:196::201a2600:1408:e:487::201a2600:1408:e:490::201a2600:140a:0:184::201a2600:140a:0:18e::201a2a02:26f0:105:18d::201a2a02:26f0:105:18e::201a2a02:26f0:13b:196::201a2a02:26f0:13b:1a3::201a2a02:26f0:a1:28c::201a2a02:26f0:a1:298::201aCNAMEmpki-ocsp.digicert.come8218.ce.akamaiedge.nete8218.dscb1.akamaiedge.netocsp-ds.ws.symantec.com.edgekey.netocsp.ws.symantec.com.edgekey.net
○A2.22.139.272015-06-20 → 2016-09-07 · 14 obs
● 2015-06-20 01:53:56
● 2015-09-19 14:54:34
○ 2015-10-08 15:16:38
● 2015-11-01 14:18:56
○ 2015-11-03 00:58:36
● 2015-11-07 10:33:30
○ 2015-11-13 09:48:00
○ 2016-01-19 20:52:46
● 2016-02-18 20:05:28
○ 2016-02-27 12:02:22
○ 2016-08-11 01:30:32
● 2016-09-07 13:59:20
○ 2016-10-15 22:17:40
○ 2026-08-11 19:51:30
○A2001:418:143c:180::201a2015-11-13 → 2015-11-17 · 6 obs
○ 2015-11-07 10:33:30
● 2015-11-13 09:48:00
○ 2015-11-15 15:10:34
● 2015-11-17 06:56:42
○ 2015-11-21 18:00:02
○ 2026-08-11 19:51:30
○A2001:418:143c:18b::201a2015-11-13 → 2015-11-17 · 6 obs
○ 2015-11-07 10:33:30
● 2015-11-13 09:48:00
○ 2015-11-15 15:10:34
● 2015-11-17 06:56:42
○ 2015-11-21 18:00:02
○ 2026-08-11 19:51:30
○A2001:4de0:2103:18c::201a2016-07-01 → 2016-07-28 · 7 obs
○ 2016-06-12 23:14:42
● 2016-07-01 14:57:54
○ 2016-07-17 22:19:48
○ 2016-07-24 05:41:56
● 2016-07-28 15:26:16
○ 2016-08-11 01:30:32
○ 2026-08-11 19:51:30
○A2001:4de0:2103:190::201a2016-07-01 → 2016-07-28 · 7 obs
○ 2016-06-12 23:14:42
● 2016-07-01 14:57:54
○ 2016-07-17 22:19:48
○ 2016-07-24 05:41:56
● 2016-07-28 15:26:16
○ 2016-08-11 01:30:32
○ 2026-08-11 19:51:30
○A2001:4de0:4103:180::201a2015-12-11 → 2016-03-08 · 7 obs
○ 2015-12-06 16:44:24
● 2015-12-11 05:34:08
○ 2015-12-15 15:23:28
○ 2016-02-27 12:02:22
● 2016-03-08 06:04:48
○ 2016-04-04 15:06:50
○ 2026-08-11 19:51:30
○A2001:4de0:4103:181::201a2015-12-11 → 2016-03-08 · 7 obs
○ 2015-12-06 16:44:24
● 2015-12-11 05:34:08
○ 2015-12-15 15:23:28
○ 2016-02-27 12:02:22
● 2016-03-08 06:04:48
○ 2016-04-04 15:06:50
○ 2026-08-11 19:51:30
○A2001:5000:1101:187::201a2015-11-15 → 2015-11-15 · 4 obs
○ 2015-11-13 09:48:00
● 2015-11-15 15:10:34
○ 2015-11-17 06:56:42
○ 2026-08-11 19:51:30
○A2001:5000:1101:188::201a2015-11-15 → 2015-11-15 · 4 obs
○ 2015-11-13 09:48:00
● 2015-11-15 15:10:34
○ 2015-11-17 06:56:42
○ 2026-08-11 19:51:30
○A2001:559:19:83::201a2015-12-06 → 2015-12-06 · 4 obs
○ 2015-11-27 10:19:30
● 2015-12-06 16:44:24
○ 2015-12-11 05:34:08
○ 2026-08-11 19:51:30
○A2001:559:19:a0::201a2015-12-06 → 2015-12-06 · 4 obs
○ 2015-11-27 10:19:30
● 2015-12-06 16:44:24
○ 2015-12-11 05:34:08
○ 2026-08-11 19:51:30
○A2001:590:1009:186::201a2015-11-21 → 2015-11-21 · 4 obs
○ 2015-11-17 06:56:42
● 2015-11-21 18:00:02
○ 2015-11-27 10:19:30
○ 2026-08-11 19:51:30
○A2001:590:1009:18d::201a2015-11-21 → 2015-11-21 · 4 obs
○ 2015-11-17 06:56:42
● 2015-11-21 18:00:02
○ 2015-11-27 10:19:30
○ 2026-08-11 19:51:30
○A2001:590:100b:185::201a2015-11-27 → 2016-01-19 · 7 obs
○ 2015-11-21 18:00:02
● 2015-11-27 10:19:30
○ 2015-12-06 16:44:24
○ 2015-12-15 15:23:28
● 2016-01-19 20:52:46
○ 2016-02-18 20:05:28
○ 2026-08-11 19:51:30
○A2001:590:100b:187::201a2015-11-27 → 2016-01-19 · 7 obs
○ 2015-11-21 18:00:02
● 2015-11-27 10:19:30
○ 2015-12-06 16:44:24
○ 2015-12-15 15:23:28
● 2016-01-19 20:52:46
○ 2016-02-18 20:05:28
○ 2026-08-11 19:51:30
○A2001:590:200a:286::201a2016-10-15 → 2016-10-15 · 4 obs
○ 2016-09-07 13:59:20
● 2016-10-15 22:17:40
○ 2016-12-21 17:27:26
○ 2026-08-11 19:51:30
○A2001:590:200a:299::201a2016-10-15 → 2016-10-15 · 4 obs
○ 2016-09-07 13:59:20
● 2016-10-15 22:17:40
○ 2016-12-21 17:27:26
○ 2026-08-11 19:51:30
○A23.15.155.272015-10-08 → 2015-10-08 · 4 obs
○ 2015-09-19 14:54:34
● 2015-10-08 15:16:38
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.37.139.272015-06-20 → 2015-06-20 · 3 obs
● 2015-06-20 01:53:56
○ 2015-09-16 20:39:12
○ 2026-08-11 19:51:30
○A23.4.187.272015-09-19 → 2016-08-11 · 18 obs
○ 2015-09-16 20:39:12
● 2015-09-19 14:54:34
● 2015-10-08 15:16:38
○ 2015-11-01 14:18:56
○ 2015-11-21 18:00:02
● 2015-11-27 10:19:30
● 2015-12-06 16:44:24
○ 2015-12-11 05:34:08
○ 2016-02-18 20:05:28
● 2016-02-27 12:02:22
○ 2016-03-08 06:04:48
○ 2016-07-01 14:57:54
● 2016-07-17 22:19:48
● 2016-07-24 05:41:56
○ 2016-07-28 15:26:16
● 2016-08-11 01:30:32
○ 2016-09-07 13:59:20
○ 2026-08-11 19:51:30
○A23.43.75.272015-11-15 → 2016-12-24 · 10 obs
○ 2015-11-13 09:48:00
● 2015-11-15 15:10:34
○ 2015-11-17 06:56:42
○ 2016-03-08 06:04:48
● 2016-04-04 15:06:50
○ 2016-05-26 08:13:44
○ 2016-12-21 17:27:26
● 2016-12-24 19:57:54
○ 2016-12-29 07:00:40
○ 2026-08-11 19:51:30
○A23.44.155.272015-06-20 → 2015-10-08 · 4 obs
● 2015-06-20 01:53:56
● 2015-10-08 15:16:38
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.47.27.272015-06-20 → 2015-06-20 · 3 obs
● 2015-06-20 01:53:56
○ 2015-09-16 20:39:12
○ 2026-08-11 19:51:30
○A23.49.139.272015-09-16 → 2015-10-08 · 5 obs
○ 2015-06-20 01:53:56
● 2015-09-16 20:39:12
● 2015-10-08 15:16:38
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.5.251.272015-06-20 → 2016-10-15 · 11 obs
● 2015-06-20 01:53:56
● 2015-09-16 20:39:12
○ 2015-09-19 14:54:34
● 2015-10-08 15:16:38
○ 2015-11-01 14:18:56
● 2015-11-03 00:58:36
○ 2015-11-07 10:33:30
○ 2016-09-07 13:59:20
● 2016-10-15 22:17:40
○ 2016-12-21 17:27:26
○ 2026-08-11 19:51:30
○A23.50.75.272015-09-16 → 2015-09-16 · 4 obs
○ 2015-06-20 01:53:56
● 2015-09-16 20:39:12
○ 2015-09-19 14:54:34
○ 2026-08-11 19:51:30
○A23.50.91.272015-06-20 → 2015-09-19 · 4 obs
● 2015-06-20 01:53:56
● 2015-09-19 14:54:34
○ 2015-10-08 15:16:38
○ 2026-08-11 19:51:30
○A23.52.59.272015-10-08 → 2015-10-08 · 4 obs
○ 2015-09-19 14:54:34
● 2015-10-08 15:16:38
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.52.91.272015-09-16 → 2016-12-29 · 24 obs
○ 2015-06-20 01:53:56
● 2015-09-16 20:39:12
● 2015-11-13 09:48:00
○ 2015-11-15 15:10:34
○ 2015-11-17 06:56:42
● 2015-11-21 18:00:02
○ 2015-11-27 10:19:30
○ 2015-12-11 05:34:08
● 2015-12-15 15:23:28
● 2016-01-19 20:52:46
○ 2016-02-18 20:05:28
○ 2016-05-26 08:13:44
● 2016-06-03 04:30:44
● 2016-07-01 14:57:54
○ 2016-07-17 22:19:48
○ 2016-07-24 05:41:56
● 2016-07-28 15:26:16
○ 2016-08-11 01:30:32
○ 2016-10-15 22:17:40
● 2016-12-21 17:27:26
○ 2016-12-24 19:57:54
● 2016-12-29 07:00:40
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.53.155.272015-09-16 → 2015-10-08 · 5 obs
○ 2015-06-20 01:53:56
● 2015-09-16 20:39:12
● 2015-10-08 15:16:38
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A23.61.75.272015-09-19 → 2015-11-17 · 6 obs
○ 2015-09-16 20:39:12
● 2015-09-19 14:54:34
○ 2015-10-08 15:16:38
● 2015-11-17 06:56:42
○ 2015-11-21 18:00:02
○ 2026-08-11 19:51:30
○A23.7.139.272015-06-20 → 2016-05-26 · 10 obs
● 2015-06-20 01:53:56
○ 2015-09-16 20:39:12
● 2015-12-11 05:34:08
○ 2015-12-15 15:23:28
○ 2016-02-27 12:02:22
● 2016-03-08 06:04:48
○ 2016-04-04 15:06:50
● 2016-05-26 08:13:44
○ 2016-06-03 04:30:44
○ 2026-08-11 19:51:30
○A2600:1406:13:285::201a2016-05-26 → 2016-05-26 · 4 obs
○ 2016-04-04 15:06:50
● 2016-05-26 08:13:44
○ 2016-06-03 04:30:44
○ 2026-08-11 19:51:30
○A2600:1406:13:291::201a2016-05-26 → 2016-05-26 · 4 obs
○ 2016-04-04 15:06:50
● 2016-05-26 08:13:44
○ 2016-06-03 04:30:44
○ 2026-08-11 19:51:30
○A2600:1408:10:183::201a2016-06-12 → 2016-12-29 · 14 obs
○ 2016-06-03 04:30:44
● 2016-06-12 23:14:42
○ 2016-07-01 14:57:54
● 2016-07-17 22:19:48
● 2016-07-24 05:41:56
○ 2016-07-28 15:26:16
● 2016-08-11 01:30:32
○ 2016-09-07 13:59:20
○ 2016-10-15 22:17:40
● 2016-12-21 17:27:26
○ 2016-12-24 19:57:54
● 2016-12-29 07:00:40
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A2600:1408:10:184::201a2016-02-27 → 2016-02-27 · 4 obs
○ 2016-02-18 20:05:28
● 2016-02-27 12:02:22
○ 2016-03-08 06:04:48
○ 2026-08-11 19:51:30
○A2600:1408:10:191::201a2016-02-27 → 2016-12-21 · 15 obs
○ 2016-02-18 20:05:28
● 2016-02-27 12:02:22
○ 2016-03-08 06:04:48
○ 2016-06-03 04:30:44
● 2016-06-12 23:14:42
○ 2016-07-01 14:57:54
● 2016-07-17 22:19:48
● 2016-07-24 05:41:56
○ 2016-07-28 15:26:16
● 2016-08-11 01:30:32
○ 2016-09-07 13:59:20
○ 2016-10-15 22:17:40
● 2016-12-21 17:27:26
○ 2016-12-24 19:57:54
○ 2026-08-11 19:51:30
○A2600:1408:10:196::201a2016-12-29 → 2016-12-29 · 4 obs
○ 2016-12-24 19:57:54
● 2016-12-29 07:00:40
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
○A2600:1408:e:487::201a2015-12-15 → 2015-12-15 · 4 obs
○ 2015-12-11 05:34:08
● 2015-12-15 15:23:28
○ 2016-01-19 20:52:46
○ 2026-08-11 19:51:30
○A2600:1408:e:490::201a2015-12-15 → 2015-12-15 · 4 obs
○ 2015-12-11 05:34:08
● 2015-12-15 15:23:28
○ 2016-01-19 20:52:46
○ 2026-08-11 19:51:30
○A2600:140a:0:184::201a2016-06-03 → 2016-06-03 · 4 obs
○ 2016-05-26 08:13:44
● 2016-06-03 04:30:44
○ 2016-06-12 23:14:42
○ 2026-08-11 19:51:30
○A2600:140a:0:18e::201a2016-06-03 → 2016-06-03 · 4 obs
○ 2016-05-26 08:13:44
● 2016-06-03 04:30:44
○ 2016-06-12 23:14:42
○ 2026-08-11 19:51:30
○A2a02:26f0:105:18d::201a2016-02-18 → 2016-04-04 · 7 obs
○ 2016-01-19 20:52:46
● 2016-02-18 20:05:28
○ 2016-02-27 12:02:22
○ 2016-03-08 06:04:48
● 2016-04-04 15:06:50
○ 2016-05-26 08:13:44
○ 2026-08-11 19:51:30
○A2a02:26f0:105:18e::201a2016-02-18 → 2016-04-04 · 7 obs
○ 2016-01-19 20:52:46
● 2016-02-18 20:05:28
○ 2016-02-27 12:02:22
○ 2016-03-08 06:04:48
● 2016-04-04 15:06:50
○ 2016-05-26 08:13:44
○ 2026-08-11 19:51:30
○A2a02:26f0:13b:196::201a2016-09-07 → 2016-09-07 · 4 obs
○ 2016-08-11 01:30:32
● 2016-09-07 13:59:20
○ 2016-10-15 22:17:40
○ 2026-08-11 19:51:30
○A2a02:26f0:13b:1a3::201a2016-09-07 → 2016-09-07 · 4 obs
○ 2016-08-11 01:30:32
● 2016-09-07 13:59:20
○ 2016-10-15 22:17:40
○ 2026-08-11 19:51:30
○A2a02:26f0:a1:28c::201a2016-12-24 → 2016-12-24 · 4 obs
○ 2016-12-21 17:27:26
● 2016-12-24 19:57:54
○ 2016-12-29 07:00:40
○ 2026-08-11 19:51:30
○A2a02:26f0:a1:298::201a2016-12-24 → 2016-12-24 · 4 obs
○ 2016-12-21 17:27:26
● 2016-12-24 19:57:54
○ 2016-12-29 07:00:40
○ 2026-08-11 19:51:30
○CNAMEe8218.ce.akamaiedge.net2015-09-16 → 2015-11-07 · 5 obs
○ 2015-06-20 01:53:56
● 2015-09-16 20:39:12
● 2015-11-07 10:33:30
○ 2015-11-13 09:48:00
○ 2026-08-11 19:51:30
○CNAMEe8218.dscb1.akamaiedge.net2015-11-13 → 2016-12-29 · 5 obs
○ 2015-11-07 10:33:30
● 2015-11-13 09:48:00
● 2016-12-29 07:00:40
○ 2017-06-22 06:50:34
○ 2026-08-11 19:51:30
●CNAMEmpki-ocsp.digicert.com2026-08-11 → 2026-08-11 · 2 obs
○ 2017-07-09 17:33:22
● 2026-08-11 19:51:30
○CNAMEocsp-ds.ws.symantec.com.edgekey.net2015-11-13 → 2017-07-09 · 4 obs
○ 2015-11-07 10:33:30
● 2015-11-13 09:48:00
● 2017-07-09 17:33:22
○ 2026-08-11 19:51:30
○CNAMEocsp.ws.symantec.com.edgekey.net2015-06-20 → 2015-11-07 · 4 obs
● 2015-06-20 01:53:56
● 2015-11-07 10:33:30
○ 2015-11-13 09:48:00
○ 2026-08-11 19:51:30

🔍 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:208.80.125.223

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: 1723ms | 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...)