Qualtrics

unknown

Uncatalogued — description coming.

1,123SPF-authorising domains

0.18%of all SPF domains in Tranco top-1M

84distinct TLDs

2026-04-28snapshot date

Historical Share

com — 546 (48.6%)

edu — 161 (14.3%)

org — 123 (11.0%)

co.uk — 21 (1.9%)

ca — 19 (1.7%)

com.au — 18 (1.6%)

de — 17 (1.5%)

gov — 16 (1.4%)

net — 15 (1.3%)

com.br — 13 (1.2%)

be — 8 (0.7%)

es — 8 (0.7%)

fr — 7 (0.6%)

nl — 7 (0.6%)

it — 7 (0.6%)

edu.au — 6 (0.5%)

org.au — 5 (0.4%)

dk — 5 (0.4%)

no — 5 (0.4%)

com.co — 5 (0.4%)

ch — 4 (0.4%)

org.uk — 4 (0.4%)

us — 4 (0.4%)

co.jp — 4 (0.4%)

gov.au — 4 (0.4%)

mx — 4 (0.4%)

pl — 4 (0.4%)

edu.sg — 3 (0.3%)

ac.uk — 3 (0.3%)

cl — 3 (0.3%)

Showing 100 of 1,123 domains. Sample sorted by length (shortest first).