Area code 905 – Ontario
905 has served Ontario since 1993, split from 416. 773 of its 800 number blocks are allocated – about 97% full. It shares its geography with overlay codes 289, 365, 742, so local calls take all ten digits. Spam complaints are comparatively rare: 363 in the 33 days to 30 October 2026, 269th of the 422 codes with five or more complaints. Most of its numbers are in Hamilton, Oshawa, St. Catharines-Thorold.
- Province
- Ontario
- In service since
- 1993
- Time zone
- Eastern
Spam complaints naming 905
FTC Do Not Call complaints where the caller ID was a 905 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 905
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 95.
Timeline
- 1993 905 goes into service, split from or overlaid on 416.
More about 905
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 905
Where is area code 905?
Ontario. It covers the same area as 289/365/742/905.
Is a call from 905 a scam?
Not by itself. 905 drew 363 FTC complaints in the 33 days to 30 October 2026, 269th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Do I need to dial 10 digits in 905?
Yes – ten digits for local calls in 905, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.