grc.com - dns.ninja
grc.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 4.79.142.200🇺🇸 AS33564.0.0.0/9 | ||||||
| PTR | grc.com | ||||||
| NS | grc.com ⭐ | ||||||
| A | 4.79.142.200🇺🇸 AS33564.0.0.0/9 | ||||||
| PTR | grc.com | ||||||
| NS | ns3.level3.net | ||||||
| A | 216.136.95.12🇺🇸 AS3549216.136.0.0/17 | ||||||
| PTR | ns3.level3.net | ||||||
| NS | ns4.level3.net | ||||||
| A | 64.132.94.251🇺🇸 AS354964.132.0.0/16 | ||||||
| PTR | ns4.level3.net | ||||||
| MX | grc.com ⭐ | ||||||
| A | 4.79.142.200🇺🇸 AS33564.0.0.0/9 | ||||||
| PTR | grc.com | ||||||
| TXT | _bpovimyxhv2xbvowiwnvlkhz27b4z4f | ||||||
| TXT | _e9izydias4fdktb7grdz8lx129rf0kz | ||||||
| TXT | 7pdq8vl28psslbzzx8g9s3pbwjvksk24 | ||||||
| TXT | google-site-verification=lTHvpojcfPIYXGkOqbku5TcOkpo52Exo-qWuQJi5bpw | ||||||
| TXT | v=spf1 ip4:4.79.142.192/28 a:client.grc.com a:grc.com -all | ||||||
| SOA | grc.comdns2005@grc.com 2026-07-24 #8 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785120067 | ||||||
rank #2694 in the tld
🔒 HSTS Preload
WOT: SAFE (93/100)
📈 Tranco rank: #22,227
PTR for
NS for
grc.com |
Previously NS for
MX for
grc.com |
Previously MX for
Subdomains
media.grc.com |
misc.grc.com |
mail.grc.com |
ns.grc.com |
shieldsup.grc.com |
forums.grc.com |
ver.grc.com |
www.grc.com |
news.grc.com |
dns.grc.com |
sqrl.grc.com |
client.grc.com |
nanoprobe.grc.com |
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
●NSgrc.com2015-08-21 → 2026-07-27 · 2 obs
● 2026-07-27 03:11:38
●NSns3.level3.net2026-07-27 → 2026-07-27 · 2 obs
● 2026-07-27 03:11:38
○NSns4.customer.level3.net2015-08-21 → 2021-03-31 · 3 obs
● 2021-03-31 03:08:48
○ 2026-07-27 03:11:38
●NSns4.level3.net2026-07-27 → 2026-07-27 · 2 obs
● 2026-07-27 03:11:38
○NSns6.customer.level3.net2015-08-21 → 2021-03-31 · 3 obs
● 2021-03-31 03:08:48
○ 2026-07-27 03:11:38
●MXgrc.com2015-08-21 → 2026-07-27 · 2 obs
● 2026-07-27 03:11:38
○MXmail.grc.com2016-08-17 → 2020-07-02 · 5 obs
● 2016-08-17 17:19:58
● 2020-07-02 06:55:12
○ 2021-03-31 03:08:48
○ 2026-07-27 03:11:38
●A4.79.142.2002015-08-21 → 2026-07-27 · 2 obs
● 2026-07-27 03:11:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net, b.gtld-servers.net... | - |
| grc.com | ns3.level3.net, ns4.level3.net | - |
✅ Authoritative Response
Server:216.136.95.12
NS records: ns3.level3.net, ns4.level3.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for grc.com (unsigned zone)
⏱️ Timing
Total: 449ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 4.79.142.200 |
| NS | 2 | ns3.level3.net, ns4.level3.net |
| MX | 1 | grc.com (pri: 10) |
| TXT | 5 | _bpovimyxhv2xbvowiwnvlkhz27b4z4f, _e9izydias4fdktb7grdz8lx129rf0kz... |
| SOA | 1 | grc.com dns2005.grc.com |
Analysis
Hierarchy
grc.com serves as parent to media.grc.com, misc.grc.com, mail.grc.com, ns.grc.com, shieldsup.grc.com along with a few other host names.
Name Server Role
grc.com acts as a name server for grc.com, meaning it is self-referentially delegated.
The name servers ns4.customer.level3.net and ns6.customer.level3.net are often paired with grc.com.
Mail Server Role
grc.com is listed as a mail server for itself.
IP Addresses
grc.com resolves to one IP address: 4.79.142.200.
Name Servers
Authority for grc.com is delegated across three name servers: grc.com, ns3.level3.net and ns4.level3.net.
grc.com has at least partial name server overlap with other domains, such as 194.59.50.in-addr.arpa, 181.12.209.in-addr.arpa, 22.4.4.in-addr.arpa and two others.
b23.ns.els-gms.att.net, b24.ns.els-gms.att.net and m23.ns.els-gms.att.net — plus 7 other name servers — are commonly paired with these name servers.
grc.com points to 4.79.142.200; ns3.level3.net points to 216.136.95.12; ns4.level3.net points to 64.132.94.251 — each hostname maps to exactly one IP address.