Definition from Wiktionary, the free dictionary
1, used to dial long-distance numbers + 800, which was, for a long time, the only North American toll-free area code
- (North America) A toll-free number or a long-distance telephone numbers; using any of North American toll-free area codes 800, 888, 877, 866, or 855.
- 866-555-1234... that's a 1-800 number, isn't it?
- 1994, Bill Clinton, Public Papers of the Presidents of the United States, William J. Clinton 
- FEMA has got a 1-800 number.
- 1999, 106-1 Hearing 
- We provided a 1-800 hot line and a new food stamp tool kit which I would also like to provide for the record.
- 2001, David Wade, Ron Recardo, Corporate Performance Management 
- Exhibit 9.2 represents a 1-800 customer ordering process.
- 2001, Mark Graham, The Third Day 
- Once when her husband had got a 1-800 number she used to get calls from all sorts of lonely weirdos who had nothing better to do late at night than call up people they didn't know.
- 2002, Elaine Dundon, The Seeds of Innovation 
- Many people have profited from providing easy services that others do not like to do, such as a simple service like barbeque cleaning, superscoopers for cleaning up after dogs, an errand service, or a 1-800 tele-tutor service for school-age children who need assistance with their homework.
- 2003, Bambi Vincent And Bob Arno, Travel Advisory!: How to Avoid Thefts, Cons, and Street Scams While Traveling 
- “I got a 1-800 number. I could check your credit card right now, and get an approval code, or find out if it's stolen or not. Just dial a 1-800 number and deal with computers."