SwitchboardProvides access to 106 million residential and 11 million business listings, as well as e-mail addresses. Listings are compiled and licensed by American Business Information, Inc, from publicly available published sources.
U. S. States Postal ServiceHome page for the U.S. Postal Service. Find a zip code, calculate postage, print a shipping label, schedule a pickup, locate a post office, track and confirm postal delivery.
