Top-Level Domain
.edu
Aggregated statistics for the top-level domain
Apex domains
—
we've enumerated
Subdomains seen
704,636
CT + DNS + brute
TLS certs
17,139
naming .edu
Hosting ASNs
—
distinct origins
Domain Distribution
Apex domains with the most known subdomains — large orgs, telecoms, hosters.
| Apex | Subdomains |
|---|---|
| illinois.edu | 21,538 |
| stanford.edu | 17,132 |
| msu.edu | 12,334 |
| umich.edu | 11,108 |
| harvard.edu | 9,206 |
| ysu.edu | 9,022 |
| pitt.edu | 8,594 |
| wisc.edu | 8,556 |
| arizona.edu | 8,217 |
| tamu.edu | 8,133 |
| umn.edu | 7,675 |
| utexas.edu | 7,502 |
| purdue.edu | 6,964 |
| cornell.edu | 6,748 |
| uci.edu | 6,659 |
| nyu.edu | 6,390 |
| ucla.edu | 6,267 |
| uiowa.edu | 6,135 |
| psu.edu | 6,122 |
| mit.edu | 6,112 |
| ucsd.edu | 6,032 |
| ucdavis.edu | 5,816 |
| northwestern.edu | 5,688 |
| gatech.edu | 5,626 |
| utah.edu | 5,470 |
| iu.edu | 5,398 |
| caltech.edu | 5,387 |
| kit.edu | 5,047 |
| byu.edu | 4,956 |
| wustl.edu | 4,897 |
| princeton.edu | 4,866 |
| ua.edu | 4,812 |
| berkeley.edu | 4,670 |
| miami.edu | 4,590 |
| uic.edu | 4,565 |
| umd.edu | 4,533 |
| uchicago.edu | 4,529 |
| uw.edu | 4,476 |
| duke.edu | 4,448 |
| rochester.edu | 4,282 |
| ufl.edu | 4,041 |
| uga.edu | 4,002 |
| ucsc.edu | 3,858 |
| upc.edu | 3,753 |
| colostate.edu | 3,744 |
| fsu.edu | 3,722 |
| unt.edu | 3,717 |
| ucsf.edu | 3,665 |
| ucf.edu | 3,563 |
| usc.edu | 3,510 |
Top Certificate Issuers
| Issuer (CA) | Certs |
|---|---|
| InCommon RSA Server CA 2 | 5,578 |
| Let's Encrypt | 1,963 |
| Amazon | 1,663 |
| DigiCert | 1,583 |
| InCommon RSA OV SSL CA 3 | 937 |
| Sectigo | 863 |
| GoDaddy | 559 |
| GlobalSign | 409 |
| InCommon ECC Server CA 2 | 406 |
| YR2 | 350 |
| YR1 | 318 |
| InCommon RSA Server CA | 267 |
| WR3 | 218 |
| YE2 | 157 |
| YE1 | 144 |
Top Hosting ASNs
No hosting attribution yet
Forward-DNS crawler hasn't resolved enough .edu apexes to BGP-attributable IPs.
Tech-Stack Distribution
No Wappalyzer detections
Body-fetcher hasn't covered enough .edu sites yet for stack patterns to emerge.
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.