tk.symcd.com - dns.ninja

tk.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: #3,689

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

tk.sa
tk.spb.ru
tk.co
tk.lviv.ua
tk.sh
tk.fan
tk.nl
tk.ws
tk.co.kr
tk.te.ua
tk.gov.tr
tk.is
tk.uy
tk.media
tk.partners
tk.la
tk.com.pl
tk.vc
tk.de
tk.net
tk.com.vn
tk.gg
tk.krakow.pl
tk.kz
tk.in.th
tk.city
tk.com.ua
tk.pp.ru
tk.cz
tk.kiev.ua
tk.sakura.ne.jp
tk.cl
tk.cx
tk.se
tk.mba
tk.dp.ua
tk.ddns.net
tk.hl.cn
tk.hu
tk.net.ua
tk.co.th
tk.ua
tk.msk.ru
tk.co.za
tk.dev
tk.to
tk.fo
tk.run
tk.on.ca
tk.fr
tk.tc
tk.org.tr
tk.ph
tk.lt
tk.id
tk.com
tk.org.tw
tk.ee
tk.pe
tk.inf.ua
tk.design
tk.gov.ba
tk.fi
tk.be
tk
tk.cr
tk.net.mk
tk.cc
tk.gl
tk.au
tk.ac.kr
tk.digital
tk.link
tk.go.th
tk.pl
tk.nov.ru
tk.ac.th
tk.by
tk.cn
tk.dk
tk.si
tk.ai
tk.cm
tk.s3.amazonaws.com
tk.center
tk.org
tk.lv
tk.website.yandexcloud.net
tk.com.au
tk.no

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kt.ca
kt.city
kt.twmail.net
kt.lt
kt.team
kt.kg
kt.am
kt.co.at
kt.nl
kt.org
kt.tj
kt.ms
kt.world
kt.ru
kt.hu
kt.su
kt.be
kt.cz
kt.cern
kt.gov.lt
kt.fitness
kt.network
kt.net
kt.la
kt.ph
kt.sakura.ne.jp
kt.sale
kt.edu.vn
kt.fyi
kt.biz
kt.cc
kt.co.ke
kt.se
kt.is
kt.ck.ua
kt.mn
kt.at
kt.ma
kt.co
kt.rs
kt.wtf
kt.io
kt.tv
kt.kiev.ua
kt.ah.cn
kt.no
kt.kz
kt.net.ru
kt.ac.th
kt.academy
kt.pe
kt.od.ua
kt.cn
kt.de
kt.lv
kt.co.kr
kt.baby
kt.kharkov.ua
kt.pl
kt.com.hk
kt.gs
kt.company
kt.to
kt.com.tr
kt.com.ua
kt.lviv.ua
kt.com.au
kt.com.pl
kt.xj.cn
kt.market
kt.cl
kt.tel
kt.fo
kt.ac.kr
kt.dk
kt.co.th
kt.ee
kt.sk
kt.fi
kt.ua

DNS History

42 records (1 active, 41 former)

20162017201820192020202120222023202420252026A2.22.139.272001:4de0:2103:18c::201a2001:4de0:2103:190::201a2001:4de0:4103:180::201a2001:4de0:4103:181::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::201a23.4.187.2723.43.75.2723.44.155.2723.47.27.2723.49.139.2723.5.251.2723.50.75.2723.50.91.2723.52.91.2723.53.155.2723.7.139.2723.9.123.272600:1406:13:285::201a2600:1406:13:291::201a2600:1408:10:183::201a2600:1408:10:191::201a2600:1408:10:196::201a2600:140a:0:184::201a2600:140a:0:18e::201a2a02:26f0:105:182::201a2a02:26f0:105:18d::201a2a02:26f0:105:18e::201a2a02:26f0:13b:196::201a2a02:26f0:13b:1a3::201aCNAMEmpki-ocsp.digicert.come8218.ce.akamaiedge.nete8218.dscb1.akamaiedge.netocsp-ds.ws.symantec.com.edgekey.netocsp.ws.symantec.com.edgekey.net
○A2.22.139.272015-08-10 → 2016-09-24 · 11 obs
● 2015-08-10 03:11:48
● 2015-10-19 13:54:00
○ 2015-10-20 20:02:20
● 2015-10-26 05:48:16
○ 2015-10-28 14:41:02
● 2015-11-07 10:33:42
○ 2015-11-25 18:02:04
○ 2016-09-13 05:40:10
● 2016-09-24 17:03:50
○ 2016-10-12 01:57:04
○ 2026-06-17 21:16:28
○A2001:4de0:2103:18c::201a2016-07-21 → 2016-07-21 · 4 obs
○ 2016-06-06 16:14:58
● 2016-07-21 01:26:08
○ 2016-08-16 11:16:40
○ 2026-06-17 21:16:28
○A2001:4de0:2103:190::201a2016-07-21 → 2016-07-21 · 4 obs
○ 2016-06-06 16:14:58
● 2016-07-21 01:26:08
○ 2016-08-16 11:16:40
○ 2026-06-17 21:16:28
○A2001:4de0:4103:180::201a2016-05-01 → 2016-05-01 · 4 obs
○ 2016-04-23 18:10:56
● 2016-05-01 20:19:24
○ 2016-05-09 11:17:56
○ 2026-06-17 21:16:28
○A2001:4de0:4103:181::201a2016-05-01 → 2016-05-01 · 4 obs
○ 2016-04-23 18:10:56
● 2016-05-01 20:19:24
○ 2016-05-09 11:17:56
○ 2026-06-17 21:16:28
○A2001:559:19:9a::201a2016-05-22 → 2016-05-22 · 4 obs
○ 2016-05-09 11:17:56
● 2016-05-22 08:03:42
○ 2016-06-02 21:15:38
○ 2026-06-17 21:16:28
○A2001:559:19:a0::201a2016-05-22 → 2016-05-22 · 4 obs
○ 2016-05-09 11:17:56
● 2016-05-22 08:03:42
○ 2016-06-02 21:15:38
○ 2026-06-17 21:16:28
○A2001:590:1009:186::201a2015-11-25 → 2016-01-30 · 8 obs
○ 2015-11-07 10:33:42
● 2015-11-25 18:02:04
○ 2015-12-29 20:47:30
○ 2016-01-19 21:47:22
● 2016-01-28 22:53:50
● 2016-01-30 10:15:54
○ 2016-04-23 18:10:56
○ 2026-06-17 21:16:28
○A2001:590:1009:18d::201a2015-11-25 → 2016-01-30 · 8 obs
○ 2015-11-07 10:33:42
● 2015-11-25 18:02:04
○ 2015-12-29 20:47:30
○ 2016-01-19 21:47:22
● 2016-01-28 22:53:50
● 2016-01-30 10:15:54
○ 2016-04-23 18:10:56
○ 2026-06-17 21:16:28
○A2001:590:100b:185::201a2016-01-19 → 2016-01-19 · 4 obs
○ 2016-01-02 17:38:06
● 2016-01-19 21:47:22
○ 2016-01-28 22:53:50
○ 2026-06-17 21:16:28
○A2001:590:100b:187::201a2016-01-19 → 2016-01-19 · 4 obs
○ 2016-01-02 17:38:06
● 2016-01-19 21:47:22
○ 2016-01-28 22:53:50
○ 2026-06-17 21:16:28
○A2001:590:200a:286::201a2016-10-26 → 2016-10-26 · 4 obs
○ 2016-10-12 01:57:04
● 2016-10-26 18:18:20
○ 2016-11-04 21:10:38
○ 2026-06-17 21:16:28
○A2001:590:200a:299::201a2016-10-26 → 2016-10-26 · 4 obs
○ 2016-10-12 01:57:04
● 2016-10-26 18:18:20
○ 2016-11-04 21:10:38
○ 2026-06-17 21:16:28
○A23.4.187.272015-10-02 → 2017-01-24 · 24 obs
○ 2015-08-10 03:11:48
● 2015-10-02 22:22:44
○ 2015-10-13 06:09:38
○ 2015-10-26 05:48:16
● 2015-10-28 14:41:02
○ 2015-11-07 10:33:42
● 2015-11-25 18:02:04
○ 2015-12-29 20:47:30
○ 2016-01-19 21:47:22
● 2016-01-28 22:53:50
○ 2016-01-30 10:15:54
○ 2016-05-09 11:17:56
● 2016-05-22 08:03:42
○ 2016-06-02 21:15:38
○ 2016-09-24 17:03:50
● 2016-10-12 01:57:04
○ 2016-10-26 18:18:20
● 2016-11-04 21:10:38
● 2016-11-13 14:12:16
○ 2016-11-26 04:15:48
● 2017-01-08 22:29:00
● 2017-01-24 15:07:10
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A23.43.75.272015-12-29 → 2016-04-23 · 8 obs
○ 2015-11-25 18:02:04
● 2015-12-29 20:47:30
● 2016-01-02 17:38:06
○ 2016-01-19 21:47:22
○ 2016-01-30 10:15:54
● 2016-04-23 18:10:56
○ 2016-05-01 20:19:24
○ 2026-06-17 21:16:28
○A23.44.155.272015-08-10 → 2015-10-02 · 4 obs
● 2015-08-10 03:11:48
● 2015-10-02 22:22:44
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A23.47.27.272015-10-02 → 2015-10-13 · 5 obs
○ 2015-08-10 03:11:48
● 2015-10-02 22:22:44
● 2015-10-13 06:09:38
○ 2015-10-19 13:54:00
○ 2026-06-17 21:16:28
○A23.49.139.272015-08-10 → 2015-10-02 · 4 obs
● 2015-08-10 03:11:48
● 2015-10-02 22:22:44
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A23.5.251.272015-08-10 → 2016-11-26 · 10 obs
● 2015-08-10 03:11:48
● 2016-05-01 20:19:24
○ 2016-05-09 11:17:56
○ 2016-10-12 01:57:04
● 2016-10-26 18:18:20
○ 2016-11-04 21:10:38
○ 2016-11-13 14:12:16
● 2016-11-26 04:15:48
○ 2017-01-08 22:29:00
○ 2026-06-17 21:16:28
○A23.50.75.272015-08-10 → 2015-08-10 · 3 obs
● 2015-08-10 03:11:48
○ 2015-10-02 22:22:44
○ 2026-06-17 21:16:28
○A23.50.91.272015-08-10 → 2015-10-02 · 4 obs
● 2015-08-10 03:11:48
● 2015-10-02 22:22:44
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A23.52.91.272015-08-10 → 2016-09-13 · 15 obs
● 2015-08-10 03:11:48
● 2015-10-20 20:02:20
○ 2015-10-26 05:48:16
○ 2016-01-02 17:38:06
● 2016-01-19 21:47:22
○ 2016-01-28 22:53:50
● 2016-01-30 10:15:54
○ 2016-04-23 18:10:56
○ 2016-05-22 08:03:42
● 2016-06-02 21:15:38
● 2016-08-16 11:16:40
○ 2016-08-29 12:43:48
● 2016-09-13 05:40:10
○ 2016-09-24 17:03:50
○ 2026-06-17 21:16:28
○A23.53.155.272015-08-10 → 2015-10-02 · 4 obs
● 2015-08-10 03:11:48
● 2015-10-02 22:22:44
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A23.7.139.272016-05-09 → 2016-05-09 · 4 obs
○ 2016-05-01 20:19:24
● 2016-05-09 11:17:56
○ 2016-05-22 08:03:42
○ 2026-06-17 21:16:28
○A23.9.123.272016-08-29 → 2016-08-29 · 4 obs
○ 2016-08-16 11:16:40
● 2016-08-29 12:43:48
○ 2016-09-13 05:40:10
○ 2026-06-17 21:16:28
○A2600:1406:13:285::201a2016-05-09 → 2016-11-26 · 7 obs
○ 2016-05-01 20:19:24
● 2016-05-09 11:17:56
○ 2016-05-22 08:03:42
○ 2016-11-13 14:12:16
● 2016-11-26 04:15:48
○ 2017-01-08 22:29:00
○ 2026-06-17 21:16:28
○A2600:1406:13:291::201a2016-05-09 → 2016-11-26 · 7 obs
○ 2016-05-01 20:19:24
● 2016-05-09 11:17:56
○ 2016-05-22 08:03:42
○ 2016-11-13 14:12:16
● 2016-11-26 04:15:48
○ 2017-01-08 22:29:00
○ 2026-06-17 21:16:28
○A2600:1408:10:183::201a2016-08-16 → 2017-01-24 · 13 obs
○ 2016-07-21 01:26:08
● 2016-08-16 11:16:40
● 2016-09-13 05:40:10
○ 2016-09-24 17:03:50
● 2016-10-12 01:57:04
○ 2016-10-26 18:18:20
● 2016-11-04 21:10:38
○ 2016-11-13 14:12:16
○ 2016-11-26 04:15:48
● 2017-01-08 22:29:00
● 2017-01-24 15:07:10
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A2600:1408:10:191::201a2016-08-16 → 2017-01-24 · 13 obs
○ 2016-07-21 01:26:08
● 2016-08-16 11:16:40
● 2016-09-13 05:40:10
○ 2016-09-24 17:03:50
● 2016-10-12 01:57:04
○ 2016-10-26 18:18:20
● 2016-11-04 21:10:38
● 2016-11-13 14:12:16
○ 2016-11-26 04:15:48
● 2017-01-08 22:29:00
● 2017-01-24 15:07:10
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○A2600:1408:10:196::201a2016-11-13 → 2016-11-13 · 4 obs
○ 2016-11-04 21:10:38
● 2016-11-13 14:12:16
○ 2016-11-26 04:15:48
○ 2026-06-17 21:16:28
○A2600:140a:0:184::201a2016-06-02 → 2016-06-06 · 5 obs
○ 2016-05-22 08:03:42
● 2016-06-02 21:15:38
● 2016-06-06 16:14:58
○ 2016-07-21 01:26:08
○ 2026-06-17 21:16:28
○A2600:140a:0:18e::201a2016-06-02 → 2016-06-06 · 5 obs
○ 2016-05-22 08:03:42
● 2016-06-02 21:15:38
● 2016-06-06 16:14:58
○ 2016-07-21 01:26:08
○ 2026-06-17 21:16:28
○A2a02:26f0:105:182::201a2015-12-29 → 2016-01-02 · 5 obs
○ 2015-11-25 18:02:04
● 2015-12-29 20:47:30
● 2016-01-02 17:38:06
○ 2016-01-19 21:47:22
○ 2026-06-17 21:16:28
○A2a02:26f0:105:18d::201a2015-12-29 → 2016-04-23 · 8 obs
○ 2015-11-25 18:02:04
● 2015-12-29 20:47:30
● 2016-01-02 17:38:06
○ 2016-01-19 21:47:22
○ 2016-01-30 10:15:54
● 2016-04-23 18:10:56
○ 2016-05-01 20:19:24
○ 2026-06-17 21:16:28
○A2a02:26f0:105:18e::201a2016-04-23 → 2016-04-23 · 4 obs
○ 2016-01-30 10:15:54
● 2016-04-23 18:10:56
○ 2016-05-01 20:19:24
○ 2026-06-17 21:16:28
○A2a02:26f0:13b:196::201a2016-09-24 → 2016-09-24 · 4 obs
○ 2016-09-13 05:40:10
● 2016-09-24 17:03:50
○ 2016-10-12 01:57:04
○ 2026-06-17 21:16:28
○A2a02:26f0:13b:1a3::201a2016-09-24 → 2016-09-24 · 4 obs
○ 2016-09-13 05:40:10
● 2016-09-24 17:03:50
○ 2016-10-12 01:57:04
○ 2026-06-17 21:16:28
○CNAMEe8218.ce.akamaiedge.net2015-10-02 → 2015-11-07 · 5 obs
○ 2015-08-10 03:11:48
● 2015-10-02 22:22:44
● 2015-11-07 10:33:42
○ 2015-11-25 18:02:04
○ 2026-06-17 21:16:28
○CNAMEe8218.dscb1.akamaiedge.net2015-11-25 → 2017-01-24 · 5 obs
○ 2015-11-07 10:33:42
● 2015-11-25 18:02:04
● 2017-01-24 15:07:10
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
●CNAMEmpki-ocsp.digicert.com2026-03-28 → 2026-06-17 · 3 obs
○ 2017-01-24 15:07:10
● 2026-03-28 00:41:14
● 2026-06-17 21:16:28
○CNAMEocsp-ds.ws.symantec.com.edgekey.net2015-11-25 → 2017-01-24 · 5 obs
○ 2015-11-07 10:33:42
● 2015-11-25 18:02:04
● 2017-01-24 15:07:10
○ 2026-03-28 00:41:14
○ 2026-06-17 21:16:28
○CNAMEocsp.ws.symantec.com.edgekey.net2015-08-10 → 2015-11-07 · 4 obs
● 2015-08-10 03:11:48
● 2015-11-07 10:33:42
○ 2015-11-25 18:02:04
○ 2026-06-17 21:16:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comi.gtld-servers.net, g.gtld-servers.net, e.gtld-servers.net, k.gtld-servers.net...-
symcd.compdns196.ultradns.com, pdns196.ultradns.net, pdns196.ultradns.org, pdns196.ultradns.biz...8 records

✅ Authoritative Response

Server:208.80.126.223

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: 413ms | 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...)