Area code 548 – Ontario
548 has served Ontario since 2016, split from 226. 515 of its 800 number blocks are allocated (64%). No carrier dominates: Other CLEC / VoIP 18.4%. It shares its geography with overlay codes 226, 382, 519, so local calls take all ten digits. Spam complaints are comparatively rare: 156 in the 33 days to 30 October 2026, 357th of the 422 codes with five or more complaints. Most of its numbers are in London, Kitchener-Waterloo, Windsor.
- Province
- Ontario
- In service since
- 2016
- Time zone
- Eastern
Who holds 548 number blocks
Share of the 515 assigned NXX blocks (64.4% of the 786 possible), across 1 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP18.4%
Spam complaints naming 548
FTC Do Not Call complaints where the caller ID was a 548 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 548
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 170.
Timeline
- 2016 548 goes into service, split from or overlaid on 226.
More about 548
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 548
Where is area code 548?
Ontario. It covers the same area as 226/382/519/548.
Is a call from 548 a scam?
Not by itself. 548 drew 156 FTC complaints in the 33 days to 30 October 2026, 357th 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 548 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 18.4%. 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 548?
Yes – ten digits for local calls in 548, 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.