th.symcd.com - dns.ninja

th.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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th.no
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th.com.ua
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th.link
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th.com.tw
th.abbott
th.pizza
th.co.uk
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th.cn
th.ma
th.sh
th.ht
th.dyndns.org
th.nu
th.com
th.lv
th.com.pl
th.my
th.au
th.casino
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th.tl
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ht.vc
ht.lv
ht.be
ht.ua
ht.dk
ht.school
ht.ms
ht.cl
ht.agency
ht.edu.vn
ht.se
ht.gs
ht.to
ht.fund
ht.fr
ht.ru
ht.nl
ht.ph
ht.tc
ht.net
ht.sa
ht.com.mx
ht.pl
ht.com.ar
ht.hatenablog.com
ht.hu
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ht.inf.br
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ht.vip
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ht.pe
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ht.org
ht.net.tw
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ht.co.th
ht.com.tr
ht.co

DNS History

42 records (1 active, 41 former)

20162017201820192020202120222023202420252026A2.22.139.272001:418:143c:180::201a2001:418:143c:18b::201a2001:4de0:2103:18c::201a2001:4de0:2103:190::201a2001:559:19:83::201a2001:559:19:9a::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::201a23.13.171.2723.15.155.2723.4.187.2723.43.75.2723.44.155.2723.47.27.2723.49.139.2723.5.11.2723.5.251.2723.50.91.2723.52.59.2723.52.91.2723.53.155.2723.61.75.272600:1400:a:183::201a2600:1400:a:198::201a2600:1408:10:183::201a2600:1408:10:191::201a2600:1408:e:183::201a2600:1408:e:190::201a2a02:26f0:105:182::201a2a02:26f0:105:18d::201a2a02:26f0:105:18e::201aCNAMEmpki-ocsp.digicert.come8218.ce.akamaiedge.nete8218.dscb1.akamaiedge.netocsp-ds.ws.symantec.com.edgekey.netocsp.ws.symantec.com.edgekey.net
○A2.22.139.272015-08-07 → 2016-04-18 · 18 obs
● 2015-08-07 21:45:32
● 2015-09-20 17:53:12
○ 2015-10-08 15:16:38
○ 2015-10-26 22:34:54
● 2015-11-01 14:18:56
○ 2015-11-03 00:58:34
● 2015-11-06 16:53:12
○ 2015-11-08 00:26:14
○ 2015-11-26 22:51:08
● 2015-11-28 23:06:00
○ 2015-12-02 01:06:48
○ 2016-01-02 17:38:06
● 2016-01-12 06:54:34
○ 2016-01-17 10:04:50
○ 2016-03-22 15:19:50
● 2016-04-18 05:20:04
○ 2016-04-23 18:10:56
○ 2026-08-11 13:38:10
○A2001:418:143c:180::201a2015-11-14 → 2015-11-14 · 4 obs
○ 2015-11-13 04:27:28
● 2015-11-14 13:01:48
○ 2015-11-18 23:26:12
○ 2026-08-11 13:38:10
○A2001:418:143c:18b::201a2015-11-14 → 2015-11-14 · 4 obs
○ 2015-11-13 04:27:28
● 2015-11-14 13:01:48
○ 2015-11-18 23:26:12
○ 2026-08-11 13:38:10
○A2001:4de0:2103:18c::201a2016-07-01 → 2016-11-30 · 9 obs
○ 2016-06-10 19:39:14
● 2016-07-01 14:57:54
● 2016-07-21 01:26:10
○ 2016-08-09 03:14:38
● 2016-09-21 02:33:08
○ 2016-10-26 18:18:16
● 2016-11-30 00:16:26
○ 2018-03-02 18:12:22
○ 2026-08-11 13:38:10
○A2001:4de0:2103:190::201a2016-07-01 → 2016-11-30 · 9 obs
○ 2016-06-10 19:39:14
● 2016-07-01 14:57:54
● 2016-07-21 01:26:10
○ 2016-08-09 03:14:38
● 2016-09-21 02:33:08
○ 2016-10-26 18:18:16
● 2016-11-30 00:16:26
○ 2018-03-02 18:12:22
○ 2026-08-11 13:38:10
○A2001:559:19:83::201a2015-12-02 → 2015-12-02 · 4 obs
○ 2015-11-28 23:06:00
● 2015-12-02 01:06:48
○ 2015-12-23 10:49:32
○ 2026-08-11 13:38:10
○A2001:559:19:9a::201a2016-03-22 → 2016-04-25 · 7 obs
○ 2016-01-30 22:36:50
● 2016-03-22 15:19:50
○ 2016-04-18 05:20:04
○ 2016-04-23 18:10:56
● 2016-04-25 23:49:48
○ 2016-06-10 19:39:14
○ 2026-08-11 13:38:10
○A2001:559:19:a0::201a2015-12-02 → 2016-04-25 · 10 obs
○ 2015-11-28 23:06:00
● 2015-12-02 01:06:48
○ 2015-12-23 10:49:32
○ 2016-01-30 22:36:50
● 2016-03-22 15:19:50
○ 2016-04-18 05:20:04
○ 2016-04-23 18:10:56
● 2016-04-25 23:49:48
○ 2016-06-10 19:39:14
○ 2026-08-11 13:38:10
○A2001:590:1009:186::201a2015-11-26 → 2015-12-23 · 7 obs
○ 2015-11-18 23:26:12
● 2015-11-26 22:51:08
○ 2015-11-28 23:06:00
○ 2015-12-02 01:06:48
● 2015-12-23 10:49:32
○ 2016-01-02 17:38:06
○ 2026-08-11 13:38:10
○A2001:590:1009:18d::201a2015-11-26 → 2015-12-23 · 7 obs
○ 2015-11-18 23:26:12
● 2015-11-26 22:51:08
○ 2015-11-28 23:06:00
○ 2015-12-02 01:06:48
● 2015-12-23 10:49:32
○ 2016-01-02 17:38:06
○ 2026-08-11 13:38:10
○A2001:590:100b:185::201a2015-11-18 → 2016-01-20 · 8 obs
○ 2015-11-14 13:01:48
● 2015-11-18 23:26:12
○ 2015-11-26 22:51:08
○ 2016-01-12 06:54:34
● 2016-01-17 10:04:50
● 2016-01-20 11:16:50
○ 2016-01-25 00:24:50
○ 2026-08-11 13:38:10
○A2001:590:100b:187::201a2015-11-18 → 2016-01-20 · 8 obs
○ 2015-11-14 13:01:48
● 2015-11-18 23:26:12
○ 2015-11-26 22:51:08
○ 2016-01-12 06:54:34
● 2016-01-17 10:04:50
● 2016-01-20 11:16:50
○ 2016-01-25 00:24:50
○ 2026-08-11 13:38:10
○A2001:590:200a:286::201a2016-10-26 → 2016-10-26 · 4 obs
○ 2016-09-21 02:33:08
● 2016-10-26 18:18:16
○ 2016-11-30 00:16:26
○ 2026-08-11 13:38:10
○A2001:590:200a:299::201a2016-10-26 → 2016-10-26 · 4 obs
○ 2016-09-21 02:33:08
● 2016-10-26 18:18:16
○ 2016-11-30 00:16:26
○ 2026-08-11 13:38:10
○A23.13.171.272015-11-18 → 2016-06-10 · 7 obs
○ 2015-11-14 13:01:48
● 2015-11-18 23:26:12
○ 2015-11-26 22:51:08
○ 2016-04-25 23:49:48
● 2016-06-10 19:39:14
○ 2016-07-01 14:57:54
○ 2026-08-11 13:38:10
○A23.15.155.272015-10-08 → 2015-10-08 · 4 obs
○ 2015-09-20 17:53:12
● 2015-10-08 15:16:38
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.4.187.272015-08-07 → 2016-11-30 · 21 obs
● 2015-08-07 21:45:32
○ 2015-09-20 17:53:12
● 2015-10-08 15:16:38
○ 2015-10-15 23:19:16
● 2015-10-26 22:34:54
○ 2015-11-01 14:18:56
○ 2015-11-13 04:27:28
● 2015-11-14 13:01:48
○ 2015-11-18 23:26:12
● 2015-11-26 22:51:08
○ 2015-11-28 23:06:00
○ 2016-01-30 22:36:50
● 2016-03-22 15:19:50
○ 2016-04-18 05:20:04
○ 2016-07-21 01:26:10
● 2016-08-09 03:14:38
○ 2016-09-21 02:33:08
○ 2016-10-26 18:18:16
● 2016-11-30 00:16:26
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.43.75.272016-01-02 → 2016-04-23 · 7 obs
○ 2015-12-23 10:49:32
● 2016-01-02 17:38:06
○ 2016-01-12 06:54:34
○ 2016-04-18 05:20:04
● 2016-04-23 18:10:56
○ 2016-04-25 23:49:48
○ 2026-08-11 13:38:10
○A23.44.155.272015-08-07 → 2015-10-08 · 4 obs
● 2015-08-07 21:45:32
● 2015-10-08 15:16:38
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.47.27.272015-10-15 → 2015-11-10 · 7 obs
○ 2015-10-08 15:16:38
● 2015-10-15 23:19:16
○ 2015-10-26 22:34:54
○ 2015-11-08 00:26:14
● 2015-11-10 17:54:04
○ 2015-11-13 04:27:28
○ 2026-08-11 13:38:10
○A23.49.139.272015-08-07 → 2015-10-08 · 5 obs
● 2015-08-07 21:45:32
○ 2015-09-20 17:53:12
● 2015-10-08 15:16:38
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.5.11.272015-08-07 → 2015-08-07 · 3 obs
● 2015-08-07 21:45:32
○ 2015-09-20 17:53:12
○ 2026-08-11 13:38:10
○A23.5.251.272015-09-20 → 2016-10-26 · 8 obs
○ 2015-08-07 21:45:32
● 2015-09-20 17:53:12
● 2015-11-03 00:58:34
○ 2015-11-06 16:53:12
○ 2016-09-21 02:33:08
● 2016-10-26 18:18:16
○ 2016-11-30 00:16:26
○ 2026-08-11 13:38:10
○A23.50.91.272015-08-07 → 2015-09-20 · 4 obs
● 2015-08-07 21:45:32
● 2015-09-20 17:53:12
○ 2015-10-08 15:16:38
○ 2026-08-11 13:38:10
○A23.52.59.272015-10-08 → 2015-10-08 · 4 obs
○ 2015-09-20 17:53:12
● 2015-10-08 15:16:38
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.52.91.272015-09-20 → 2016-09-21 · 23 obs
○ 2015-08-07 21:45:32
● 2015-09-20 17:53:12
● 2015-11-08 00:26:14
○ 2015-11-10 17:54:04
● 2015-11-13 04:27:28
○ 2015-11-14 13:01:48
○ 2015-11-28 23:06:00
● 2015-12-02 01:06:48
● 2015-12-23 10:49:32
○ 2016-01-02 17:38:06
○ 2016-01-12 06:54:34
● 2016-01-17 10:04:50
● 2016-01-30 22:36:50
○ 2016-03-22 15:19:50
○ 2016-04-23 18:10:56
● 2016-04-25 23:49:48
○ 2016-06-10 19:39:14
● 2016-07-01 14:57:54
● 2016-07-21 01:26:10
○ 2016-08-09 03:14:38
● 2016-09-21 02:33:08
○ 2016-10-26 18:18:16
○ 2026-08-11 13:38:10
○A23.53.155.272015-08-07 → 2015-10-08 · 4 obs
● 2015-08-07 21:45:32
● 2015-10-08 15:16:38
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
○A23.61.75.272015-09-20 → 2015-09-20 · 4 obs
○ 2015-08-07 21:45:32
● 2015-09-20 17:53:12
○ 2015-10-08 15:16:38
○ 2026-08-11 13:38:10
○A2600:1400:a:183::201a2015-11-13 → 2015-11-13 · 4 obs
○ 2015-11-10 17:54:04
● 2015-11-13 04:27:28
○ 2015-11-14 13:01:48
○ 2026-08-11 13:38:10
○A2600:1400:a:198::201a2015-11-13 → 2015-11-13 · 4 obs
○ 2015-11-10 17:54:04
● 2015-11-13 04:27:28
○ 2015-11-14 13:01:48
○ 2026-08-11 13:38:10
○A2600:1408:10:183::201a2016-01-30 → 2016-08-09 · 10 obs
○ 2016-01-25 00:24:50
● 2016-01-30 22:36:50
○ 2016-03-22 15:19:50
○ 2016-04-25 23:49:48
● 2016-06-10 19:39:14
○ 2016-07-01 14:57:54
○ 2016-07-21 01:26:10
● 2016-08-09 03:14:38
○ 2016-09-21 02:33:08
○ 2026-08-11 13:38:10
○A2600:1408:10:191::201a2016-01-30 → 2016-08-09 · 10 obs
○ 2016-01-25 00:24:50
● 2016-01-30 22:36:50
○ 2016-03-22 15:19:50
○ 2016-04-25 23:49:48
● 2016-06-10 19:39:14
○ 2016-07-01 14:57:54
○ 2016-07-21 01:26:10
● 2016-08-09 03:14:38
○ 2016-09-21 02:33:08
○ 2026-08-11 13:38:10
○A2600:1408:e:183::201a2016-01-25 → 2016-01-25 · 4 obs
○ 2016-01-20 11:16:50
● 2016-01-25 00:24:50
○ 2016-01-30 22:36:50
○ 2026-08-11 13:38:10
○A2600:1408:e:190::201a2016-01-25 → 2016-01-25 · 4 obs
○ 2016-01-20 11:16:50
● 2016-01-25 00:24:50
○ 2016-01-30 22:36:50
○ 2026-08-11 13:38:10
○A2a02:26f0:105:182::201a2016-01-02 → 2016-01-12 · 5 obs
○ 2015-12-23 10:49:32
● 2016-01-02 17:38:06
● 2016-01-12 06:54:34
○ 2016-01-17 10:04:50
○ 2026-08-11 13:38:10
○A2a02:26f0:105:18d::201a2015-11-28 → 2016-04-23 · 12 obs
○ 2015-11-26 22:51:08
● 2015-11-28 23:06:00
○ 2015-12-02 01:06:48
○ 2015-12-23 10:49:32
● 2016-01-02 17:38:06
● 2016-01-12 06:54:34
○ 2016-01-17 10:04:50
○ 2016-03-22 15:19:50
● 2016-04-18 05:20:04
● 2016-04-23 18:10:56
○ 2016-04-25 23:49:48
○ 2026-08-11 13:38:10
○A2a02:26f0:105:18e::201a2015-11-28 → 2016-04-23 · 8 obs
○ 2015-11-26 22:51:08
● 2015-11-28 23:06:00
○ 2015-12-02 01:06:48
○ 2016-03-22 15:19:50
● 2016-04-18 05:20:04
● 2016-04-23 18:10:56
○ 2016-04-25 23:49:48
○ 2026-08-11 13:38:10
○CNAMEe8218.ce.akamaiedge.net2015-09-20 → 2015-11-10 · 5 obs
○ 2015-08-07 21:45:32
● 2015-09-20 17:53:12
● 2015-11-10 17:54:04
○ 2015-11-13 04:27:28
○ 2026-08-11 13:38:10
○CNAMEe8218.dscb1.akamaiedge.net2015-11-13 → 2016-11-30 · 5 obs
○ 2015-11-10 17:54:04
● 2015-11-13 04:27:28
● 2016-11-30 00:16:26
○ 2017-08-25 12:26:52
○ 2026-08-11 13:38:10
●CNAMEmpki-ocsp.digicert.com2026-08-11 → 2026-08-11 · 2 obs
○ 2018-03-02 18:12:22
● 2026-08-11 13:38:10
○CNAMEocsp-ds.ws.symantec.com.edgekey.net2015-11-13 → 2018-03-02 · 4 obs
○ 2015-11-10 17:54:04
● 2015-11-13 04:27:28
● 2018-03-02 18:12:22
○ 2026-08-11 13:38:10
○CNAMEocsp.ws.symantec.com.edgekey.net2015-08-07 → 2015-11-10 · 4 obs
● 2015-08-07 21:45:32
● 2015-11-10 17:54:04
○ 2015-11-13 04:27:28
○ 2026-08-11 13:38:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comj.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net, e.gtld-servers.net...-
symcd.compdns196.ultradns.com, pdns196.ultradns.net, pdns196.ultradns.org, pdns196.ultradns.biz...8 records

✅ Authoritative Response

Server:208.94.148.223

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: 478ms | 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...)