gu.symcd.com - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

gu.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: #3,586

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

51 records (1 active, 50 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::201a2001:4de0:4103:1a2::201a2001:590:1009:186::201a2001:590:1009:18d::201a2001:590:100b:185::201a2001:590:100b:187::201a2001:590:100b:18f::201a2001:590:100b:193::201a2001:590:100b:19c::201a2001:590:200a:286::201a2001:590:200a:299::201a2001:590:200a:2a4::201a2001:668:108:986::201a2001:668:108:98b::201a23.37.139.2723.4.187.2723.43.75.2723.44.155.2723.47.27.2723.49.139.2723.5.251.2723.50.75.2723.50.91.2723.51.235.2723.52.91.2723.53.155.2723.55.155.2723.61.187.2723.7.139.272600:1406:13:285::201a2600:1406:13:291::201a2600:1408:10:183::201a2600:1408:10:191::201a2a02:26f0:105:182::201a2a02:26f0:105:189::201a2a02:26f0:105:18d::201a2a02:26f0:105:18e::201a2a02:26f0:9800:19e::201a2a02:26f0:9800:1b7::201aCNAMEmpki-ocsp.digicert.come8218.ce.akamaiedge.nete8218.dscb1.akamaiedge.nete8218.dscb1.akamaiedge.net.0.1.cn.akamaiedge.netocsp-ds.ws.symantec.com.edgekey.netocsp.ws.symantec.com.edgekey.net
○A2.22.139.272015-06-20 → 2016-02-18 · 14 obs
● 2015-06-20 02:39:50
● 2015-10-16 09:37:12
○ 2015-11-03 02:07:20
○ 2015-12-04 23:08:30
● 2015-12-08 16:17:36
○ 2015-12-10 14:05:08
○ 2016-01-04 10:13:06
● 2016-01-14 02:56:30
● 2016-02-02 18:08:46
○ 2016-02-07 10:12:42
○ 2016-02-14 23:19:36
● 2016-02-18 20:05:40
○ 2016-02-29 12:23:44
○ 2026-08-15 07:48:22
○A2001:418:143c:180::201a2015-11-13 → 2015-11-14 · 5 obs
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
● 2015-11-14 20:36:10
○ 2015-11-19 13:03:48
○ 2026-08-15 07:48:22
○A2001:418:143c:18b::201a2015-11-13 → 2015-11-14 · 5 obs
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
● 2015-11-14 20:36:10
○ 2015-11-19 13:03:48
○ 2026-08-15 07:48:22
○A2001:4de0:2103:18c::201a2016-07-28 → 2016-11-28 · 7 obs
○ 2016-07-11 15:20:12
● 2016-07-28 15:27:34
○ 2016-08-16 11:16:40
○ 2016-11-14 02:23:14
● 2016-11-28 19:10:42
○ 2016-12-15 01:20:44
○ 2026-08-15 07:48:22
○A2001:4de0:2103:190::201a2016-07-28 → 2016-11-28 · 7 obs
○ 2016-07-11 15:20:12
● 2016-07-28 15:27:34
○ 2016-08-16 11:16:40
○ 2016-11-14 02:23:14
● 2016-11-28 19:10:42
○ 2016-12-15 01:20:44
○ 2026-08-15 07:48:22
○A2001:4de0:4103:180::201a2015-11-20 → 2015-12-10 · 9 obs
○ 2015-11-19 13:03:48
● 2015-11-20 21:34:54
○ 2015-11-26 22:02:04
● 2015-11-30 16:45:28
● 2015-12-04 23:08:30
○ 2015-12-08 16:17:36
● 2015-12-10 14:05:08
○ 2015-12-13 03:15:40
○ 2026-08-15 07:48:22
○A2001:4de0:4103:181::201a2015-11-30 → 2015-12-10 · 7 obs
○ 2015-11-26 22:02:04
● 2015-11-30 16:45:28
● 2015-12-04 23:08:30
○ 2015-12-08 16:17:36
● 2015-12-10 14:05:08
○ 2015-12-13 03:15:40
○ 2026-08-15 07:48:22
○A2001:4de0:4103:1a2::201a2015-11-20 → 2015-11-20 · 4 obs
○ 2015-11-19 13:03:48
● 2015-11-20 21:34:54
○ 2015-11-26 22:02:04
○ 2026-08-15 07:48:22
○A2001:590:1009:186::201a2015-11-26 → 2016-02-07 · 10 obs
○ 2015-11-20 21:34:54
● 2015-11-26 22:02:04
○ 2015-11-30 16:45:28
○ 2015-12-31 16:17:46
● 2016-01-04 10:13:06
○ 2016-01-14 02:56:30
○ 2016-02-02 18:08:46
● 2016-02-07 10:12:42
○ 2016-02-10 00:25:14
○ 2026-08-15 07:48:22
○A2001:590:1009:18d::201a2015-11-26 → 2016-02-07 · 10 obs
○ 2015-11-20 21:34:54
● 2015-11-26 22:02:04
○ 2015-11-30 16:45:28
○ 2015-12-31 16:17:46
● 2016-01-04 10:13:06
○ 2016-01-14 02:56:30
○ 2016-02-02 18:08:46
● 2016-02-07 10:12:42
○ 2016-02-10 00:25:14
○ 2026-08-15 07:48:22
○A2001:590:100b:185::201a2015-11-19 → 2016-02-14 · 7 obs
○ 2015-11-14 20:36:10
● 2015-11-19 13:03:48
○ 2015-11-20 21:34:54
○ 2016-02-10 00:25:14
● 2016-02-14 23:19:36
○ 2016-02-18 20:05:40
○ 2026-08-15 07:48:22
○A2001:590:100b:187::201a2015-11-19 → 2016-02-14 · 8 obs
○ 2015-11-14 20:36:10
● 2015-11-19 13:03:48
○ 2015-11-20 21:34:54
○ 2016-02-07 10:12:42
● 2016-02-10 00:25:14
● 2016-02-14 23:19:36
○ 2016-02-18 20:05:40
○ 2026-08-15 07:48:22
○A2001:590:100b:18f::201a2016-10-05 → 2016-10-05 · 4 obs
○ 2016-09-28 00:47:58
● 2016-10-05 18:30:12
○ 2016-10-17 18:31:52
○ 2026-08-15 07:48:22
○A2001:590:100b:193::201a2016-02-10 → 2016-02-10 · 4 obs
○ 2016-02-07 10:12:42
● 2016-02-10 00:25:14
○ 2016-02-14 23:19:36
○ 2026-08-15 07:48:22
○A2001:590:100b:19c::201a2016-10-05 → 2016-10-05 · 4 obs
○ 2016-09-28 00:47:58
● 2016-10-05 18:30:12
○ 2016-10-17 18:31:52
○ 2026-08-15 07:48:22
○A2001:590:200a:286::201a2016-09-28 → 2016-12-20 · 7 obs
○ 2016-09-22 00:38:42
● 2016-09-28 00:47:58
○ 2016-10-05 18:30:12
○ 2016-12-15 01:20:44
● 2016-12-20 05:52:32
○ 2017-01-25 00:57:58
○ 2026-08-15 07:48:22
○A2001:590:200a:299::201a2016-09-28 → 2016-09-28 · 4 obs
○ 2016-09-22 00:38:42
● 2016-09-28 00:47:58
○ 2016-10-05 18:30:12
○ 2026-08-15 07:48:22
○A2001:590:200a:2a4::201a2016-12-20 → 2016-12-20 · 4 obs
○ 2016-12-15 01:20:44
● 2016-12-20 05:52:32
○ 2017-01-25 00:57:58
○ 2026-08-15 07:48:22
○A2001:668:108:986::201a2016-04-18 → 2016-04-18 · 4 obs
○ 2016-04-17 12:26:56
● 2016-04-18 20:46:34
○ 2016-05-01 23:04:48
○ 2026-08-15 07:48:22
○A2001:668:108:98b::201a2016-04-18 → 2016-04-18 · 4 obs
○ 2016-04-17 12:26:56
● 2016-04-18 20:46:34
○ 2016-05-01 23:04:48
○ 2026-08-15 07:48:22
○A23.37.139.272015-06-20 → 2015-06-20 · 3 obs
● 2015-06-20 02:39:50
○ 2015-09-16 20:39:12
○ 2026-08-15 07:48:22
○A23.4.187.272015-10-01 → 2016-11-14 · 25 obs
○ 2015-09-21 19:45:04
● 2015-10-01 19:20:24
○ 2015-10-16 09:37:12
○ 2015-11-07 03:34:26
● 2015-11-09 03:43:22
○ 2015-11-13 09:46:40
● 2015-11-14 20:36:10
● 2015-11-19 13:03:48
○ 2015-11-20 21:34:54
○ 2015-12-10 14:05:08
● 2015-12-13 03:15:40
○ 2015-12-31 16:17:46
● 2016-01-04 10:13:06
○ 2016-01-14 02:56:30
○ 2016-02-10 00:25:14
● 2016-02-14 23:19:36
○ 2016-02-18 20:05:40
○ 2016-09-28 00:47:58
● 2016-10-05 18:30:12
● 2016-10-17 18:31:52
○ 2016-10-29 11:12:40
● 2016-11-05 14:42:40
● 2016-11-14 02:23:14
○ 2016-11-28 19:10:42
○ 2026-08-15 07:48:22
○A23.43.75.272015-12-31 → 2016-04-17 · 8 obs
○ 2015-12-13 03:15:40
● 2015-12-31 16:17:46
○ 2016-01-04 10:13:06
○ 2016-02-18 20:05:40
● 2016-02-29 12:23:44
● 2016-04-17 12:26:56
○ 2016-04-18 20:46:34
○ 2026-08-15 07:48:22
○A23.44.155.272015-06-20 → 2015-10-01 · 4 obs
● 2015-06-20 02:39:50
● 2015-10-01 19:20:24
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.47.27.272015-06-20 → 2016-02-10 · 5 obs
● 2015-06-20 02:39:50
○ 2015-09-16 20:39:12
● 2016-02-10 00:25:14
○ 2016-02-14 23:19:36
○ 2026-08-15 07:48:22
○A23.49.139.272015-09-16 → 2015-10-01 · 5 obs
○ 2015-06-20 02:39:50
● 2015-09-16 20:39:12
● 2015-10-01 19:20:24
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.5.251.272015-06-20 → 2016-12-20 · 24 obs
● 2015-06-20 02:39:50
● 2015-09-16 20:39:12
○ 2015-09-21 19:45:04
● 2015-10-01 19:20:24
○ 2015-11-03 02:07:20
● 2015-11-07 03:34:26
○ 2015-11-09 03:43:22
○ 2015-11-19 13:03:48
● 2015-11-20 21:34:54
○ 2015-11-26 22:02:04
● 2015-11-30 16:45:28
○ 2015-12-02 06:11:02
● 2015-12-04 23:08:30
○ 2015-12-08 16:17:36
○ 2016-09-22 00:38:42
● 2016-09-28 00:47:58
○ 2016-10-05 18:30:12
○ 2016-10-17 18:31:52
● 2016-10-29 11:12:40
○ 2016-11-05 14:42:40
○ 2016-12-15 01:20:44
● 2016-12-20 05:52:32
○ 2017-01-25 00:57:58
○ 2026-08-15 07:48:22
○A23.50.75.272015-09-16 → 2015-11-26 · 6 obs
○ 2015-06-20 02:39:50
● 2015-09-16 20:39:12
○ 2015-09-21 19:45:04
● 2015-11-26 22:02:04
○ 2015-11-30 16:45:28
○ 2026-08-15 07:48:22
○A23.50.91.272015-06-20 → 2015-10-01 · 4 obs
● 2015-06-20 02:39:50
● 2015-10-01 19:20:24
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.51.235.272016-05-01 → 2016-05-01 · 4 obs
○ 2016-04-18 20:46:34
● 2016-05-01 23:04:48
○ 2016-05-10 02:08:18
○ 2026-08-15 07:48:22
○A23.52.91.272015-09-16 → 2016-12-15 · 22 obs
○ 2015-06-20 02:39:50
● 2015-09-16 20:39:12
● 2015-09-21 19:45:04
○ 2015-10-01 19:20:24
○ 2015-10-16 09:37:12
● 2015-11-03 02:07:20
○ 2015-11-07 03:34:26
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
○ 2015-11-14 20:36:10
○ 2016-02-02 18:08:46
● 2016-02-07 10:12:42
○ 2016-02-10 00:25:14
○ 2016-05-10 02:08:18
● 2016-07-11 15:20:12
● 2016-09-22 00:38:42
○ 2016-09-28 00:47:58
○ 2016-11-14 02:23:14
● 2016-11-28 19:10:42
● 2016-12-15 01:20:44
○ 2016-12-20 05:52:32
○ 2026-08-15 07:48:22
○A23.53.155.272015-09-16 → 2015-10-01 · 5 obs
○ 2015-06-20 02:39:50
● 2015-09-16 20:39:12
● 2015-10-01 19:20:24
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.55.155.272017-03-02 → 2017-03-16 · 5 obs
○ 2017-01-25 00:57:58
● 2017-03-02 16:40:16
● 2017-03-16 08:03:12
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.61.187.272015-09-21 → 2015-10-01 · 5 obs
○ 2015-09-16 20:39:12
● 2015-09-21 19:45:04
● 2015-10-01 19:20:24
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A23.7.139.272015-12-02 → 2017-01-25 · 15 obs
○ 2015-11-30 16:45:28
● 2015-12-02 06:11:02
○ 2015-12-04 23:08:30
○ 2015-12-08 16:17:36
● 2015-12-10 14:05:08
○ 2015-12-13 03:15:40
○ 2016-04-17 12:26:56
● 2016-04-18 20:46:34
○ 2016-05-01 23:04:48
● 2016-05-10 02:08:18
○ 2016-07-11 15:20:12
○ 2016-12-20 05:52:32
● 2017-01-25 00:57:58
○ 2017-03-02 16:40:16
○ 2026-08-15 07:48:22
○A2600:1406:13:285::201a2016-05-10 → 2017-01-25 · 10 obs
○ 2016-05-01 23:04:48
● 2016-05-10 02:08:18
○ 2016-07-11 15:20:12
○ 2016-10-17 18:31:52
● 2016-10-29 11:12:40
○ 2016-11-05 14:42:40
○ 2016-12-20 05:52:32
● 2017-01-25 00:57:58
○ 2017-03-02 16:40:16
○ 2026-08-15 07:48:22
○A2600:1406:13:291::201a2016-05-10 → 2017-01-25 · 10 obs
○ 2016-05-01 23:04:48
● 2016-05-10 02:08:18
○ 2016-07-11 15:20:12
○ 2016-10-17 18:31:52
● 2016-10-29 11:12:40
○ 2016-11-05 14:42:40
○ 2016-12-20 05:52:32
● 2017-01-25 00:57:58
○ 2017-03-02 16:40:16
○ 2026-08-15 07:48:22
○A2600:1408:10:183::201a2015-12-13 → 2016-12-15 · 18 obs
○ 2015-12-10 14:05:08
● 2015-12-13 03:15:40
○ 2015-12-31 16:17:46
○ 2016-05-10 02:08:18
● 2016-07-11 15:20:12
○ 2016-07-28 15:27:34
● 2016-08-16 11:16:40
● 2016-09-22 00:38:42
○ 2016-09-28 00:47:58
○ 2016-10-05 18:30:12
● 2016-10-17 18:31:52
○ 2016-10-29 11:12:40
● 2016-11-05 14:42:40
● 2016-11-14 02:23:14
○ 2016-11-28 19:10:42
● 2016-12-15 01:20:44
○ 2016-12-20 05:52:32
○ 2026-08-15 07:48:22
○A2600:1408:10:191::201a2015-12-13 → 2016-12-15 · 18 obs
○ 2015-12-10 14:05:08
● 2015-12-13 03:15:40
○ 2015-12-31 16:17:46
○ 2016-05-10 02:08:18
● 2016-07-11 15:20:12
○ 2016-07-28 15:27:34
● 2016-08-16 11:16:40
● 2016-09-22 00:38:42
○ 2016-09-28 00:47:58
○ 2016-10-05 18:30:12
● 2016-10-17 18:31:52
○ 2016-10-29 11:12:40
● 2016-11-05 14:42:40
● 2016-11-14 02:23:14
○ 2016-11-28 19:10:42
● 2016-12-15 01:20:44
○ 2016-12-20 05:52:32
○ 2026-08-15 07:48:22
○A2a02:26f0:105:182::201a2015-12-31 → 2015-12-31 · 4 obs
○ 2015-12-13 03:15:40
● 2015-12-31 16:17:46
○ 2016-01-04 10:13:06
○ 2026-08-15 07:48:22
○A2a02:26f0:105:189::201a2016-01-14 → 2016-01-14 · 4 obs
○ 2016-01-04 10:13:06
● 2016-01-14 02:56:30
○ 2016-01-21 16:49:52
○ 2026-08-15 07:48:22
○A2a02:26f0:105:18d::201a2015-12-08 → 2016-05-01 · 16 obs
○ 2015-12-04 23:08:30
● 2015-12-08 16:17:36
○ 2015-12-10 14:05:08
○ 2015-12-13 03:15:40
● 2015-12-31 16:17:46
○ 2016-01-04 10:13:06
● 2016-01-14 02:56:30
● 2016-02-02 18:08:46
○ 2016-02-07 10:12:42
○ 2016-02-14 23:19:36
● 2016-02-18 20:05:40
● 2016-04-17 12:26:56
○ 2016-04-18 20:46:34
● 2016-05-01 23:04:48
○ 2016-05-10 02:08:18
○ 2026-08-15 07:48:22
○A2a02:26f0:105:18e::201a2015-12-08 → 2016-05-01 · 14 obs
○ 2015-12-04 23:08:30
● 2015-12-08 16:17:36
○ 2015-12-10 14:05:08
○ 2016-01-14 02:56:30
● 2016-01-21 16:49:52
● 2016-02-02 18:08:46
○ 2016-02-07 10:12:42
○ 2016-02-14 23:19:36
● 2016-02-18 20:05:40
● 2016-04-17 12:26:56
○ 2016-04-18 20:46:34
● 2016-05-01 23:04:48
○ 2016-05-10 02:08:18
○ 2026-08-15 07:48:22
○A2a02:26f0:9800:19e::201a2017-03-02 → 2017-03-16 · 5 obs
○ 2017-01-25 00:57:58
● 2017-03-02 16:40:16
● 2017-03-16 08:03:12
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○A2a02:26f0:9800:1b7::201a2017-03-02 → 2017-03-16 · 5 obs
○ 2017-01-25 00:57:58
● 2017-03-02 16:40:16
● 2017-03-16 08:03:12
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○CNAMEe8218.ce.akamaiedge.net2015-09-16 → 2015-11-09 · 5 obs
○ 2015-06-20 02:39:50
● 2015-09-16 20:39:12
● 2015-11-09 03:43:22
○ 2015-11-13 09:46:40
○ 2026-08-15 07:48:22
○CNAMEe8218.dscb1.akamaiedge.net2015-11-13 → 2017-03-16 · 5 obs
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
● 2017-03-16 08:03:12
○ 2017-06-10 07:09:44
○ 2026-08-15 07:48:22
○CNAMEe8218.dscb1.akamaiedge.net.0.1.cn.akamaiedge.net2015-11-13 → 2016-05-01 · 7 obs
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
○ 2015-11-14 20:36:10
○ 2016-04-18 20:46:34
● 2016-05-01 23:04:48
○ 2016-05-10 02:08:18
○ 2026-08-15 07:48:22
●CNAMEmpki-ocsp.digicert.com2026-08-15 → 2026-08-15 · 2 obs
○ 2018-02-08 22:04:30
● 2026-08-15 07:48:22
○CNAMEocsp-ds.ws.symantec.com.edgekey.net2015-11-13 → 2018-02-08 · 4 obs
○ 2015-11-09 03:43:22
● 2015-11-13 09:46:40
● 2018-02-08 22:04:30
○ 2026-08-15 07:48:22
○CNAMEocsp.ws.symantec.com.edgekey.net2015-06-20 → 2015-11-09 · 4 obs
● 2015-06-20 02:39:50
● 2015-11-09 03:43:22
○ 2015-11-13 09:46:40
○ 2026-08-15 07:48:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comk.gtld-servers.net, a.gtld-servers.net, e.gtld-servers.net, g.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: 394ms | 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...)