The best replacement for phone numbers is addresses.

The best alternatives to phone numbers are rated as following:
★★★★★  addresses
★★  email addresses

Your alternative for phone numbers is not listed? Suggest!
Speaking about phone numbers, one probably shouldn't forget about address.

Other search terms related to phone numbers and their ratings are:
★★★★★ address
★★ area codes
addresses
You have in mind a companion for phone numbers and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of phone numbers in all years. Click on graph for more.
phone numbers
addresses
email addresses