Area code 742 – Ontario
742 has served Ontario since 2021, split from 905. It is still largely empty: 149 of 800 number blocks allocated. Other CLEC / VoIP is the largest holder with 51.0%. It shares its geography with overlay codes 289, 365, 905, so local calls take all ten digits. Spam complaints are comparatively rare: 6 in the 33 days to 30 October 2026, 413th of the 422 codes with five or more complaints. Most of its numbers are in Brampton, St. Catharines-Thorold, Hamilton.
- Province
- Ontario
- In service since
- 2021
- Time zone
- Eastern
Who holds 742 number blocks
Share of the 149 assigned NXX blocks (18.6% of the 786 possible), across 1 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP51%
Spam complaints naming 742
FTC Do Not Call complaints where the caller ID was a 742 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 742
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 68.
Timeline
- 2021 742 goes into service, split from or overlaid on 905.
More about 742
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 742
Where is area code 742?
Ontario. It covers the same area as 289/365/742/905.
Is a call from 742 a scam?
Not by itself. 742 drew 6 FTC complaints in the 33 days to 30 October 2026, 413th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Which carrier owns 742 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 51.0%. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 742?
Yes – ten digits for local calls in 742, 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.