Top-Level Domain
.edu
Aggregated statistics for the top-level domain
Apex domains
5,858
we've enumerated
Subdomains seen
695,204
CT + DNS + brute
TLS certs
17,053
naming .edu
Hosting ASNs
—
distinct origins
Domain Distribution
Apex domains with the most known subdomains — large orgs, telecoms, hosters.
| Apex | Subdomains |
|---|---|
| illinois.edu | 21,343 |
| stanford.edu | 17,070 |
| umich.edu | 11,039 |
| msu.edu | 10,943 |
| harvard.edu | 9,077 |
| ysu.edu | 8,989 |
| pitt.edu | 8,506 |
| wisc.edu | 8,469 |
| arizona.edu | 8,207 |
| tamu.edu | 8,110 |
| umn.edu | 7,646 |
| utexas.edu | 7,477 |
| purdue.edu | 6,960 |
| cornell.edu | 6,714 |
| uci.edu | 6,564 |
| nyu.edu | 6,383 |
| ucla.edu | 6,227 |
| uiowa.edu | 6,132 |
| psu.edu | 6,102 |
| ucsd.edu | 6,027 |
| mit.edu | 5,991 |
| ucdavis.edu | 5,804 |
| northwestern.edu | 5,677 |
| gatech.edu | 5,571 |
| utah.edu | 5,449 |
| iu.edu | 5,255 |
| caltech.edu | 5,184 |
| kit.edu | 5,022 |
| byu.edu | 4,949 |
| wustl.edu | 4,875 |
| princeton.edu | 4,848 |
| ua.edu | 4,788 |
| berkeley.edu | 4,643 |
| miami.edu | 4,585 |
| uic.edu | 4,525 |
| umd.edu | 4,519 |
| uchicago.edu | 4,519 |
| uw.edu | 4,466 |
| duke.edu | 4,428 |
| rochester.edu | 4,256 |
| ufl.edu | 4,013 |
| uga.edu | 3,980 |
| ucsc.edu | 3,846 |
| upc.edu | 3,745 |
| colostate.edu | 3,742 |
| unt.edu | 3,715 |
| fsu.edu | 3,715 |
| ucsf.edu | 3,652 |
| uconn.edu | 3,498 |
| usc.edu | 3,495 |
Top Certificate Issuers
| Issuer (CA) | Certs |
|---|---|
| InCommon RSA Server CA 2 | 5,559 |
| Let's Encrypt | 1,963 |
| Amazon | 1,662 |
| DigiCert | 1,568 |
| InCommon RSA OV SSL CA 3 | 923 |
| Sectigo | 862 |
| GoDaddy | 558 |
| GlobalSign | 409 |
| InCommon ECC Server CA 2 | 402 |
| YR2 | 346 |
| YR1 | 312 |
| InCommon RSA Server CA | 267 |
| WR3 | 214 |
| YE2 | 157 |
| Entrust | 143 |
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.