Constant Contact

esp 🇺🇸 US

US small-business newsletter platform.

3,722SPF-authorising domains

0.598%of all SPF domains in Tranco top-1M

92distinct TLDs

2026-04-28snapshot date

Historical Share

com — 1,371 (36.8%)

de — 1,181 (31.7%)

org — 551 (14.8%)

edu — 101 (2.7%)

net — 83 (2.2%)

gov — 79 (2.1%)

ch — 67 (1.8%)

at — 62 (1.7%)

ca — 32 (0.9%)

eu — 17 (0.5%)

us — 16 (0.4%)

info — 15 (0.4%)

it — 13 (0.3%)

io — 10 (0.3%)

co.uk — 8 (0.2%)

co — 6 (0.2%)

gov.co — 6 (0.2%)

berlin — 4 (0.1%)

es — 4 (0.1%)

ac.at — 4 (0.1%)

ie — 3 (0.1%)

aero — 3 (0.1%)

nl — 3 (0.1%)

com.mx — 3 (0.1%)

schule — 2 (0.1%)

travel — 2 (0.1%)

fr — 2 (0.1%)

co.za — 2 (0.1%)

ag — 2 (0.1%)

uk — 2 (0.1%)

Showing 100 of 3,722 domains. Sample sorted by length (shortest first).