tb.symcb.com - robtex.com

tb.symcb.com

CNAMEcrl-symcprod.digicert.com
DNSSEC⚠️ Not signed

symcb.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
TXTv=spf1 -all
SOAns20.digicertdns.comdns@digicertdns.com 2009-01-02 #9
📈 Tranco rank: #2,684

symcb.com

symcb.com is a certificate infrastructure domain operated by DigiCert (formerly Symantec PKI). The domain serves as an endpoint for SSL/TLS certificate validation services, including OCSP (Online Certificate Status Protocol) and CRL (Certificate Revocation List) distribution.

Purpose

The domain hosts certificate validation infrastructure:

  • OCSP responders at subdomains like d.symcb.com and te.symcb.com
  • Used by browsers and applications to verify certificate validity in real-time
  • Part of the legacy Symantec Certificate Authority infrastructure now managed by DigiCert

History

  • Originally operated by Symantec Corporation as part of their PKI/certificate authority business
  • In 2017, DigiCert acquired Symantec's Website Security and PKI solutions
  • The symcb.com domain continues to operate for backward compatibility with certificates issued under the Symantec brand

Technical Details

  • Nameservers: Split between UltraDNS (pdns196) and DigiCert DNS (ns20-ns25.digicertdns.com)
  • SPF: v=spf1 -all (no mail accepted - infrastructure-only domain)
  • DNSSEC: Not enabled
  • Tranco Rank: #2,781 (high traffic due to certificate validation requests)

The high Tranco ranking reflects the domain's heavy use by browsers worldwide for certificate status checks.

Same first word

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Similar names

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bt.no
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bt.de
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bt.org.ua
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bt.my
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bt.by
bt.fo
bt.ae
bt.to
bt.me
bt.design
bt.associates
bt.ru
bt.inf.br
bt.ac.th
bt.cash

DNS History

66 records (1 active, 65 former)

20162017201820192020202120222023202420252026A2.22.133.1632001:268:80e:185::1abd2001:268:80e:18a::1abd2001:418:143c:187::1abd2001:418:143c:18a::1abd2001:4de0:2103:18d::1abd2001:4de0:2103:1a2::1abd2001:5000:1101:183::1abd2001:5000:1101:187::1abd2001:559:19:8c::1abd2001:559:19:a3::1abd2001:590:1009:180::1abd2001:590:1009:18b::1abd2001:590:100b:18b::1abd2001:590:100b:18c::1abd2001:590:100b:199::1abd2001:590:100b:1a3::1abd2001:668:108:982::1abd2001:668:108:995::1abd23.4.181.16323.43.69.16323.44.149.16323.47.21.16323.49.133.16323.5.245.16323.50.69.16323.50.85.16323.52.85.16323.53.149.16323.55.149.16323.59.133.16323.61.181.16323.7.133.1632600:1405:6:188::1abd2600:1405:6:189::1abd2600:1406:13:282::1abd2600:1406:13:287::1abd2600:1406:20:193::1abd2600:1406:20:1a2::1abd2600:1408:10:180::1abd2600:1408:10:18e::1abd2600:1408:10:194::1abd2600:1408:e:180::1abd2600:1408:e:190::1abd2600:1408:e:191::1abd2600:140a:0:183::1abd2600:140a:0:189::1abd2600:1413:1:481::1abd2600:1413:1:48f::1abd2600:1415:11:38b::1abd2600:1415:11:396::1abd2600:1419:0:38f::1abd2600:1419:0:393::1abd2a02:26f0:105:18c::1abd2a02:26f0:105:18e::1abd2a02:26f0:105:191::1abd2a02:26f0:13b:18b::1abd2a02:26f0:13b:198::1abd2a02:26f0:71:284::1abd2a02:26f0:71:286::1abdCNAMEcrl-symcprod.digicert.comcrl-ds.ws.symantec.com.edgekey.netcrl.ws.symantec.com.edgekey.nete6845.ce.akamaiedge.nete6845.dscb1.akamaiedge.nete6845.dscb1.akamaiedge.net.0.1.cn.akamaiedge.net
○A2.22.133.1632015-08-03 → 2016-10-18 · 10 obs
● 2015-08-03 22:13:36
● 2015-09-16 02:07:24
○ 2015-10-21 14:39:06
○ 2015-11-01 20:34:08
● 2015-11-12 10:57:48
○ 2015-11-13 12:15:44
○ 2016-09-27 13:33:08
● 2016-10-18 18:11:46
○ 2016-10-31 19:00:08
○ 2026-03-05 22:57:56
○A2001:268:80e:185::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2001:268:80e:18a::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2001:418:143c:187::1abd2015-11-13 → 2015-11-13 · 4 obs
○ 2015-11-12 10:57:48
● 2015-11-13 12:15:44
○ 2015-11-21 04:10:16
○ 2026-03-05 22:57:56
○A2001:418:143c:18a::1abd2015-11-13 → 2015-11-13 · 4 obs
○ 2015-11-12 10:57:48
● 2015-11-13 12:15:44
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○A2001:4de0:2103:18d::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2001:4de0:2103:1a2::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2001:5000:1101:183::1abd2015-11-12 → 2015-11-12 · 4 obs
○ 2015-11-01 20:34:08
● 2015-11-12 10:57:48
○ 2015-11-13 12:15:44
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○A2001:5000:1101:187::1abd2015-11-12 → 2015-11-12 · 4 obs
○ 2015-11-01 20:34:08
● 2015-11-12 10:57:48
○ 2015-11-13 12:15:44
○ 2026-03-05 22:57:56
○A2001:559:19:8c::1abd2016-03-23 → 2016-05-22 · 7 obs
○ 2016-03-15 14:45:32
● 2016-03-23 20:09:18
○ 2016-04-02 01:59:22
○ 2016-04-23 19:51:56
● 2016-05-22 02:06:04
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○A2001:559:19:a3::1abd2016-03-23 → 2016-05-22 · 7 obs
○ 2016-03-15 14:45:32
● 2016-03-23 20:09:18
○ 2016-04-02 01:59:22
○ 2016-04-23 19:51:56
● 2016-05-22 02:06:04
○ 2016-06-07 07:56:02
○ 2026-03-05 22:57:56
○A2001:590:1009:180::1abd2015-12-02 → 2016-01-15 · 8 obs
○ 2015-11-21 04:10:16
● 2015-12-02 07:42:30
○ 2015-12-04 19:50:24
○ 2016-01-08 04:57:48
● 2016-01-09 06:39:56
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○A2001:590:1009:18b::1abd2015-12-02 → 2016-01-15 · 8 obs
○ 2015-11-21 04:10:16
● 2015-12-02 07:42:30
○ 2015-12-04 19:50:24
○ 2016-01-08 04:57:48
● 2016-01-09 06:39:56
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○A2001:590:100b:18b::1abd2015-11-21 → 2016-01-20 · 9 obs
○ 2015-11-13 12:15:44
● 2015-11-21 04:10:16
○ 2015-12-02 07:42:30
● 2015-12-04 19:50:24
○ 2015-12-30 20:54:28
○ 2016-01-18 06:24:28
● 2016-01-20 10:42:48
○ 2016-03-07 22:20:30
○ 2026-03-05 22:57:56
○A2001:590:100b:18c::1abd2015-11-21 → 2016-01-20 · 9 obs
○ 2015-11-13 12:15:44
● 2015-11-21 04:10:16
○ 2015-12-02 07:42:30
● 2015-12-04 19:50:24
○ 2015-12-30 20:54:28
○ 2016-01-18 06:24:28
● 2016-01-20 10:42:48
○ 2016-03-07 22:20:30
○ 2026-03-05 22:57:56
○A2001:590:100b:199::1abd2016-10-31 → 2016-10-31 · 4 obs
○ 2016-10-18 18:11:46
● 2016-10-31 19:00:08
○ 2017-05-19 20:30:32
○ 2026-03-05 22:57:56
○A2001:590:100b:1a3::1abd2016-10-31 → 2016-10-31 · 4 obs
○ 2016-10-18 18:11:46
● 2016-10-31 19:00:08
○ 2017-05-19 20:30:32
○ 2026-03-05 22:57:56
○A2001:668:108:982::1abd2016-01-08 → 2016-04-13 · 7 obs
○ 2015-12-30 20:54:28
● 2016-01-08 04:57:48
○ 2016-01-09 06:39:56
○ 2016-04-11 01:45:26
● 2016-04-13 20:59:32
○ 2016-04-23 19:51:56
○ 2026-03-05 22:57:56
○A2001:668:108:995::1abd2016-01-08 → 2016-04-13 · 7 obs
○ 2015-12-30 20:54:28
● 2016-01-08 04:57:48
○ 2016-01-09 06:39:56
○ 2016-04-11 01:45:26
● 2016-04-13 20:59:32
○ 2016-04-23 19:51:56
○ 2026-03-05 22:57:56
○A23.4.181.1632015-10-21 → 2017-05-19 · 21 obs
○ 2015-09-16 02:07:24
● 2015-10-21 14:39:06
○ 2015-11-01 20:34:08
○ 2015-11-13 12:15:44
● 2015-11-21 04:10:16
● 2015-12-04 19:50:24
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○ 2016-01-08 04:57:48
● 2016-01-09 06:39:56
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● 2016-04-04 23:00:46
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● 2016-09-27 13:33:08
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● 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
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○A23.43.69.1632015-12-30 → 2016-04-23 · 12 obs
○ 2015-12-04 19:50:24
● 2015-12-30 20:54:28
○ 2016-01-08 04:57:48
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● 2016-01-18 06:24:28
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● 2016-03-07 22:20:30
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● 2016-04-23 19:51:56
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○A23.44.149.1632015-08-03 → 2015-09-16 · 4 obs
● 2015-08-03 22:13:36
● 2015-09-16 02:07:24
○ 2017-05-19 20:30:32
○ 2026-03-05 22:57:56
○A23.47.21.1632015-11-01 → 2016-04-11 · 10 obs
○ 2015-10-21 14:39:06
● 2015-11-01 20:34:08
○ 2015-11-12 10:57:48
○ 2016-03-07 22:20:30
● 2016-03-15 14:45:32
○ 2016-03-23 20:09:18
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● 2016-04-11 01:45:26
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○A23.49.133.1632015-08-03 → 2017-05-19 · 5 obs
● 2015-08-03 22:13:36
○ 2015-09-16 02:07:24
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.5.245.1632015-08-03 → 2017-05-19 · 4 obs
● 2015-08-03 22:13:36
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.50.69.1632015-08-03 → 2015-09-16 · 4 obs
● 2015-08-03 22:13:36
● 2015-09-16 02:07:24
○ 2017-05-19 20:30:32
○ 2026-03-05 22:57:56
○A23.50.85.1632015-08-03 → 2017-05-19 · 4 obs
● 2015-08-03 22:13:36
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.52.85.1632015-09-16 → 2016-08-23 · 17 obs
○ 2015-08-03 22:13:36
● 2015-09-16 02:07:24
● 2015-11-13 12:15:44
○ 2015-11-21 04:10:16
○ 2016-01-09 06:39:56
● 2016-01-15 08:38:56
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● 2016-01-20 10:42:48
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● 2016-05-22 02:06:04
● 2016-08-23 00:36:04
○ 2016-09-27 13:33:08
○ 2026-03-05 22:57:56
○A23.53.149.1632015-08-03 → 2017-05-19 · 4 obs
● 2015-08-03 22:13:36
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.55.149.1632017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.59.133.1632017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.61.181.1632017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A23.7.133.1632016-01-08 → 2017-05-19 · 10 obs
○ 2015-12-30 20:54:28
● 2016-01-08 04:57:48
○ 2016-01-09 06:39:56
○ 2016-04-11 01:45:26
● 2016-04-13 20:59:32
○ 2016-04-23 19:51:56
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2600:1405:6:188::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2600:1405:6:189::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
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○A2600:1406:13:282::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
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○A2600:1406:13:287::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2600:1406:20:193::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
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○A2600:1406:20:1a2::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2600:1408:10:180::1abd2016-08-23 → 2016-09-27 · 5 obs
○ 2016-06-16 00:00:16
● 2016-08-23 00:36:04
● 2016-09-27 13:33:08
○ 2016-10-18 18:11:46
○ 2026-03-05 22:57:56
○A2600:1408:10:18e::1abd2016-08-23 → 2016-08-23 · 4 obs
○ 2016-06-16 00:00:16
● 2016-08-23 00:36:04
○ 2016-09-27 13:33:08
○ 2026-03-05 22:57:56
○A2600:1408:10:194::1abd2016-09-27 → 2016-09-27 · 4 obs
○ 2016-08-23 00:36:04
● 2016-09-27 13:33:08
○ 2016-10-18 18:11:46
○ 2026-03-05 22:57:56
○A2600:1408:e:180::1abd2016-04-02 → 2016-04-11 · 5 obs
○ 2016-03-23 20:09:18
● 2016-04-02 01:59:22
● 2016-04-11 01:45:26
○ 2016-04-13 20:59:32
○ 2026-03-05 22:57:56
○A2600:1408:e:190::1abd2016-03-15 → 2016-03-15 · 4 obs
○ 2016-03-07 22:20:30
● 2016-03-15 14:45:32
○ 2016-03-23 20:09:18
○ 2026-03-05 22:57:56
○A2600:1408:e:191::1abd2016-03-15 → 2016-04-11 · 7 obs
○ 2016-03-07 22:20:30
● 2016-03-15 14:45:32
○ 2016-03-23 20:09:18
● 2016-04-02 01:59:22
● 2016-04-11 01:45:26
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○A2600:140a:0:183::1abd2016-06-07 → 2016-06-16 · 5 obs
○ 2016-05-22 02:06:04
● 2016-06-07 07:56:02
● 2016-06-16 00:00:16
○ 2016-08-23 00:36:04
○ 2026-03-05 22:57:56
○A2600:140a:0:189::1abd2016-06-07 → 2016-06-16 · 5 obs
○ 2016-05-22 02:06:04
● 2016-06-07 07:56:02
● 2016-06-16 00:00:16
○ 2016-08-23 00:36:04
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○A2600:1413:1:481::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
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○A2600:1413:1:48f::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
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○A2600:1415:11:38b::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
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○ 2026-03-05 22:57:56
○A2600:1415:11:396::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
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○ 2026-03-05 22:57:56
○A2600:1419:0:38f::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2600:1419:0:393::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2a02:26f0:105:18c::1abd2015-12-30 → 2016-01-18 · 7 obs
○ 2015-12-04 19:50:24
● 2015-12-30 20:54:28
○ 2016-01-08 04:57:48
○ 2016-01-15 08:38:56
● 2016-01-18 06:24:28
○ 2016-01-20 10:42:48
○ 2026-03-05 22:57:56
○A2a02:26f0:105:18e::1abd2016-03-07 → 2016-04-23 · 7 obs
○ 2016-01-20 10:42:48
● 2016-03-07 22:20:30
○ 2016-03-15 14:45:32
○ 2016-04-13 20:59:32
● 2016-04-23 19:51:56
○ 2016-05-22 02:06:04
○ 2026-03-05 22:57:56
○A2a02:26f0:105:191::1abd2015-12-30 → 2016-04-23 · 12 obs
○ 2015-12-04 19:50:24
● 2015-12-30 20:54:28
○ 2016-01-08 04:57:48
○ 2016-01-15 08:38:56
● 2016-01-18 06:24:28
○ 2016-01-20 10:42:48
● 2016-03-07 22:20:30
○ 2016-03-15 14:45:32
○ 2016-04-13 20:59:32
● 2016-04-23 19:51:56
○ 2016-05-22 02:06:04
○ 2026-03-05 22:57:56
○A2a02:26f0:13b:18b::1abd2016-10-18 → 2016-10-18 · 4 obs
○ 2016-09-27 13:33:08
● 2016-10-18 18:11:46
○ 2016-10-31 19:00:08
○ 2026-03-05 22:57:56
○A2a02:26f0:13b:198::1abd2016-10-18 → 2016-10-18 · 4 obs
○ 2016-09-27 13:33:08
● 2016-10-18 18:11:46
○ 2016-10-31 19:00:08
○ 2026-03-05 22:57:56
○A2a02:26f0:71:284::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○A2a02:26f0:71:286::1abd2017-05-19 → 2017-05-19 · 4 obs
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○CNAMEcrl-ds.ws.symantec.com.edgekey.net2015-11-12 → 2017-11-03 · 4 obs
○ 2015-11-01 20:34:08
● 2015-11-12 10:57:48
● 2017-11-03 08:34:12
○ 2026-03-05 22:57:56
●CNAMEcrl-symcprod.digicert.com2026-03-05 → 2026-03-05 · 2 obs
○ 2017-11-03 08:34:12
● 2026-03-05 22:57:56
○CNAMEcrl.ws.symantec.com.edgekey.net2015-08-03 → 2015-11-01 · 4 obs
● 2015-08-03 22:13:36
● 2015-11-01 20:34:08
○ 2015-11-12 10:57:48
○ 2026-03-05 22:57:56
○CNAMEe6845.ce.akamaiedge.net2015-09-16 → 2015-11-01 · 5 obs
○ 2015-08-03 22:13:36
● 2015-09-16 02:07:24
● 2015-11-01 20:34:08
○ 2015-11-12 10:57:48
○ 2026-03-05 22:57:56
○CNAMEe6845.dscb1.akamaiedge.net2015-11-12 → 2017-05-19 · 5 obs
○ 2015-11-01 20:34:08
● 2015-11-12 10:57:48
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56
○CNAMEe6845.dscb1.akamaiedge.net.0.1.cn.akamaiedge.net2015-11-13 → 2017-05-19 · 10 obs
○ 2015-11-12 10:57:48
● 2015-11-13 12:15:44
○ 2015-11-21 04:10:16
○ 2015-12-30 20:54:28
● 2016-01-08 04:57:48
○ 2016-01-09 06:39:56
○ 2016-10-31 19:00:08
● 2017-05-19 20:30:32
○ 2017-07-09 22:28:34
○ 2026-03-05 22:57:56

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net, m.gtld-servers.net...-
symcb.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 symcb.com (unsigned zone)

⏱️ Timing

Total: 439ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1crl-symcprod.digicert.com

📌 Glue Records Collected

Total: 8

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