grc.com
Home of Gibson Research Corporation
grc.com is registered with Tucows Domains Inc. since December 17, 1991 (34.9 years). The registration expires on December 16, 2033. The site runs on Google Analytics 4, Google Programmable Search, HSTS. Its email security grade is B. Its SSL certificate is issued by DigiCert Inc and is valid for 137 more days.
- Domain age
- 34.9 yrs
- Technologies
- 3
- Email security
- B
- SSL days left
- 137
Registration
| Registrar | Tucows Domains Inc. |
|---|---|
| IANA ID | 69 |
| Registered | December 17, 1991 |
| Expires | December 16, 2033 |
| Updated | July 25, 2026 |
| Status | client transfer prohibited, client update prohibited |
| Name servers | ns3.level3.net, ns4.level3.net |
| DNSSEC | Not signed |
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 4.79.142.200 | 86400 |
| MX | grc.com 10 | 86400 |
| NS | ns3.level3.net | 86400 |
| NS | ns4.level3.net | 86400 |
| CAA | issue 0 digicert.com | 86400 |
| TXT | google-site-verification=lTHvpojcfPIYXGkOqbku5TcOkpo52Exo-qWuQJi5bpw | 86400 |
| TXT | _bpovimyxhv2xbvowiwnvlkhz27b4z4f | 86400 |
| TXT | _e9izydias4fdktb7grdz8lx129rf0kz | 86400 |
| TXT | v=spf1 ip4:4.79.142.192/28 a:client.grc.com a:grc.com -all | 86400 |
| TXT | 7pdq8vl28psslbzzx8g9s3pbwjvksk24 | 86400 |
Technology stack
Analytics and advertising IDs
google_analytics:G-GS3MK15LN5SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, DigiCert Global G2 TLS RSA SHA256 2020 CA1, DigiCert Inc |
| Expires | March 27, 2027 |
| Days remaining | 137 |
| Protocol | TLSv1.2 |
| Names | grc.com, *.grc.com, grctech.com, *.grctech.com, grc.sc, breath.cafe, biotech.cafe |
Email security
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- goodSPF record found.
- goodSPF ends with -all: servers you have not listed are rejected (hard fail).
- goodDMARC policy is reject: mail that fails authentication is blocked.
- goodDMARC aggregate reports are sent to mailto:[email protected].
- goodDKIM keys found (selector: dkim).
- good1 MX record(s) found.
- goodBIMI record found: supporting inboxes can show your brand logo.
Homepage metadata
| Title | Home of Gibson Research Corporation |
|---|---|
| Description | Steve Gibson's and Gibson Research Corporation's Web homepage. |
| Language | en |
| Indexable | Yes |
| Word count | 225 |
About grc.com
Who is the registrar of grc.com?
grc.com is registered with Tucows Domains Inc. (IANA ID 69).
When does grc.com expire?
The current registration of grc.com expires on December 16, 2033. It was first registered on December 17, 1991.
What technology does grc.com use?
We detected 3 technologies on grc.com, including Google Analytics 4, Google Programmable Search, HSTS.
Does grc.com protect its email with SPF and DMARC?
grc.com scores 87/100 (grade B) for email security. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection. No TLS-RPT record, so you won't hear about failed encrypted deliveries.
What are the name servers of grc.com?
grc.com uses ns3.level3.net, ns4.level3.net.