mdcalc.com
- Domain Power global ranking: #31,786
Its Domain Power Rank is relatively high. This domain was registered at least 20 years ago. Links from a broad range of domains appear in the observed data.
- Global Rank
- #31,786
▲ 2,176
- Rank in TLD
- #14,535
▲ 786
- Referring Domains
- 2,433
▲ 89
- Avg. Referrer Power Rank
- 27.6
- Subdomains
- 9
- Domain age
- 20 yr 11 mo
Link Overview
- Avg. Referrer Power Rank
- 27.6
- Median Referrer Power Rank
- 24.3
- Referring Domains
- 2,433
- Linked Domains
- 108
Referring Domains by Power Rank
0–9 376
10–19 583
20–29 539
30–39 403
40–49 243
50–59 140
60–69 81
70–79 50
80–89 15
90–100 3
Total 2,433
Referring Domains
| Referring domain | Power Rank | Global Rank |
|---|---|---|
| google.com | 99.8 | #1 |
| apple.com | 93.5 | #22 |
| wikipedia.org | 91.8 | #34 |
| bit.ly | 88.4 | #67 |
| nih.gov | 87.1 | #91 |
| columbia.edu | 85.2 | #151 |
| linktr.ee | 84.7 | #161 |
| jotform.com | 84.5 | #170 |
| www.gov.uk | 84.5 | #169 |
| substack.com | 84.4 | #173 |
Basic Information
- TLD
- .com
- Registration date
- 23 Nov 2005
- Last updated
- 18 Oct 2025
- Expires
- 23 Nov 2034 (2,940 days remaining)
- Domain statuses
- clientTransferProhibited
- Registry
- VeriSign Global Registry Services
- Registrar
- NameCheap, Inc.
Subdomain
apps.mdcalc.comblog.mdcalc.comcdn-web.mdcalc.comcdn-web-img.mdcalc.comehr.mdcalc.compaging.mdcalc.comprepsheets.mdcalc.comqa.mdcalc.comwww.mdcalc.com
DNS
| Type | Name | TTL | Value |
|---|---|---|---|
| A | mdcalc.com | 300 | 104.26.6.31 |
| A | mdcalc.com | 300 | 172.67.75.135 |
| A | mdcalc.com | 300 | 104.26.7.31 |
| MX | mdcalc.com | 300 | 0 aspmx.l.google.com |
| MX | mdcalc.com | 300 | 10 aspmx2.googlemail.com |
| MX | mdcalc.com | 300 | 10 aspmx3.googlemail.com |
| MX | mdcalc.com | 300 | 5 alt1.aspmx.l.google.com |
| MX | mdcalc.com | 300 | 5 alt2.aspmx.l.google.com |
| NS | mdcalc.com | 86400 | janet.ns.cloudflare.com |
| NS | mdcalc.com | 86400 | vick.ns.cloudflare.com |
| SOA | mdcalc.com | 1800 | janet.ns.cloudflare.com. dns.cloudflare.com. 2419228761 10000 2400 604800 1800 |
| TXT | mdcalc.com | 300 | apple-domain-verification=ebM7I9jbWCicbK0E |
| TXT | mdcalc.com | 300 | atlassian-domain-verification=kqUL45phdIUHsOA3D6gRUts8aepSlnH5UJK8FBqaZ1h8jYs1Goj/6yJ1CY10Ex0N |
| TXT | mdcalc.com | 300 | google-site-verification=ZAFax3K27FynA2oj-yIbnu66rjfQOVgN3NoSJenBLKc |
| TXT | mdcalc.com | 300 | google-site-verification=eQSyOHCIPicVd4zLS1IPavbFJukUWLlbWZlhndo0HMk |
| TXT | mdcalc.com | 300 | google-site-verification=z8frn5BESd-X20KPHEhKpiDrpo7gz9Gx8reIJHBIAEA |
| TXT | mdcalc.com | 300 | linkedin-site-verification=4fdefd2e-6ae8-4e5b-9371-5d07bf6e0d0c |
| TXT | mdcalc.com | 300 | v=spf1 include:_spf.google.com include:servers.mcsv.net include:_spf.paubox.com -all |
Email Authentication
- MX
- Valid
- SPF
- Valid
- DMARC
- Valid
DMARC is set to p=reject, asking receiving servers to reject messages that fail authentication.
Some information is cached or comes from our own analysis, so it may not be current or complete. Our link analysis does not cover every link on the web. Metrics are based on our own methodology and should not be taken as definitive assessments of a domain’s or service’s quality or trustworthiness.