KnowBe4

unknown

Uncatalogued — description coming.

3,508SPF-authorising domains

0.563%of all SPF domains in Tranco top-1M

170distinct TLDs

2026-04-28snapshot date

Historical Share

com — 1,966 (56.0%)

org — 421 (12.0%)

edu — 148 (4.2%)

gov — 115 (3.3%)

ca — 74 (2.1%)

co.uk — 68 (1.9%)

de — 64 (1.8%)

net — 57 (1.6%)

nl — 40 (1.1%)

com.br — 35 (1.0%)

io — 32 (0.9%)

com.au — 31 (0.9%)

ch — 24 (0.7%)

us — 24 (0.7%)

ai — 18 (0.5%)

org.uk — 17 (0.5%)

co — 17 (0.5%)

co.za — 16 (0.5%)

it — 14 (0.4%)

eu — 14 (0.4%)

fr — 11 (0.3%)

ie — 10 (0.3%)

cl — 10 (0.3%)

co.nz — 9 (0.3%)

co.jp — 8 (0.2%)

be — 8 (0.2%)

ac.uk — 8 (0.2%)

at — 7 (0.2%)

nz — 6 (0.2%)

co.id — 6 (0.2%)

Showing 100 of 3,508 domains. Sample sorted by length (shortest first).