`ea.symcd.com`

	CNAME	`mpki-ocsp.digicert.com`
	DNSSEC	⚠️ Not signed

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

ea.co.nz

ea.at

ea.se

ea.money

ea.co.za

ea.io

ea.net

ea.ltd.uk

ea.gl

ea.com

ea.sk

ea.la

ea.st

ea.hu

ea.fr

ea.com.cn

ea.fi

ea.finance

ea.cx

ea.photos

ea.cl

ea.ae

ea.com.pe

ea.com.tr

ea.company

ea.com.sg

ea.de

ea.tc

ea.ru

ea.ca

ea.gr

ea.chat

ea.spb.ru

ea.pl

ea.country

ea.no

ea.edu

ea.ms

ea.fyi

ea.rs

ea.pp.ru

ea.wpmudev.host

ea.org

ea.me

ea.sa

ea.hk

ea.nl

ea.org.au

ea.vg

ea.gov.au

ea.com.py

ea.com.al

ea.im

ea.gov.om

ea.com.hk

ea.aw

ea.cz

ea.com.gt

ea.legal

ea.ro

ea.net.cn

ea.co

ea.gov.mk

ea.com.tw

ea.org.br

ea.tel

ea.govt.nz

ea.do

ea.s3.amazonaws.com

ea.com.ua

ea.by

ea.works

ea.si

ea.ee

ea.md

ea.qc.ca

ea.lv

ea.wtf

ea.sg

ea.com.mx

ea.org.nz

Similar names

ae.ae

ae.gr

ae.lv

ae.pt

ae.net.br

ae.tax

ae.expert

ae.s3.amazonaws.com

ae.cq.cn

ae.nu

ae.life

ae.com.gt

ae.sa

ae.ma

ae.technology

ae.k12.oh.us

ae.ru

ae.lt

ae.cx

ae.am

ae.company

ae.studio

ae.cm

ae.exchange

ae.be

ae.com.sg

ae.com.br

ae.hr

ae.cn

ae.com.na

ae.com.pa

ae.design

ae.poznan.pl

ae.ie

ae.live

ae.nl

ae.co.zw

ae.ventures

ae.org.za

ae.co.id

ae.com

ae.vc

ae.krakow.pl

ae.pictures

ae.com.co

ae.katowice.pl

ae.com.tr

ae.uz

ae.org.ua

ae.edgesuite.net

ae.gov.ma

ae.com.pe

ae.chat

ae.cc

ae.net.ua

ae.ee

ae.cool

ae.gc.ca

ae.au

ae.net.my

ae.at

ae.tv

ae.zone

ae.dk

ae.gs

ae.ac

ae.web.id

ae.aco

ae.team

ae.jgora.pl

ae.si

ae.cz

ae.to

ae.ag

ae.edu.rs

ae.gg

ae.media

ae.digital

ae.net

ae.org

ae.cr

DNS History

1 record (1 active, 0 former)

●CNAMEmpki-ocsp.digicert.com2026-03-14 → 2026-03-14 · 2 obs

● 2026-03-14 09:15:46
● 2026-03-14 09:15:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, b.gtld-servers.net, m.gtld-servers.net, h.gtld-servers.net...	-
symcd.com	pdns196.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: 2317ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mpki-ocsp.digicert.com`

📌 Glue Records Collected

Total: 8

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

ea.symcd.com - robtex.com