Area codes › Ontario › 548

Canada Area code 548 - London, ON

Area code 548 is a North American Numbering Plan telephone area code serving Telephone area code for southwestern Ontario, Canada in Ontario. It was activated in 1953 and today covers roughly 494,785 residents across 1 cities and towns, primarily in Simcoe County .

Sources: CRTC, Wikipedia, and community-submitted reports · Updated
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Local time in 548 ?
-
Population served ?
0.5M
Overlay code ?
519, 226, 382
Time zone ?
Eastern (ET)
Activated ?
1953

Who called me from area code 548?

A call from area code 548 most likely originates from London or elsewhere in Ontario - but caller ID spoofing means the area code alone cannot confirm who called. The only reliable way to identify the caller is to check the full 10-digit number:

  1. Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
  2. Compare it against the recently reported scam numbers in 548 below.
  3. If the call was unwanted, report it to the Canadian Anti-Fraud Centre and use the report form on this page so other 548 residents see it.
Report a scam call from 548 Help other 548-area residents - takes 20 seconds, no signup

Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.

Only the number, category, and description are stored. IP addresses are one-way hashed for rate-limiting and never stored raw. Reports are moderated before publication. Links are not allowed in descriptions.

Should I answer a call from a 548 number? Take the 30-second quiz - 5 questions, verdict + advice

Runs entirely in your browser - nothing is sent or stored.

1. Were you expecting a call today?
2. Do you recognise the specific number (not just the area code)?
3. Have you searched the number online yet?
4. Is it during normal business hours in 548?
5. Are you actively waiting on a business decision (delivery, loan, job, etc.)?

Where is the 548 area code? Coverage map

The pin marks London, the largest city served by area code 548. Zoom and pan to explore the coverage region.

Interactive map. Click a pin for city details. Data © OpenStreetMap contributors.

Area codes near 548 (overlay + neighboring)

If a caller ID shows one of these codes, the call is probably still from the London area or a nearby region. Click any code to see its own page.

Same geography as 548 (overlay codes)

These codes cover the exact same area as 548. A number starting with 519 could literally be your neighbor - overlay codes get assigned when 548's numbers run out.

Neighboring regions (codes next door)

These codes cover regions adjacent to 548. Common for calls from nearby cities and across county lines.

Reporting unwanted and scam calls from 548 numbers

Canada does not publish per-area-code complaint counts the way the US FCC does. Instead, unwanted and fraudulent 548 calls are handled by these national bodies, and reporting a number helps regulators act on it:

  • Unwanted telemarketing: file a complaint with the National Do Not Call List (DNCL) or call 1-866-580-3625. Registering your own number on the DNCL also reduces legal telemarketing.
  • Scam or fraud calls: report to the Canadian Anti-Fraud Centre (run by the RCMP, OPP and Competition Bureau) at 1-888-495-8501.
  • Spoofed caller ID: Canadian carriers use STIR/SHAKEN caller-ID authentication under CRTC direction, so a spoofed 548 number may show up as unverified on newer phones.

Sources: CRTC, National DNCL, and the Canadian Anti-Fraud Centre.

Recently reported scam numbers in 548

No reports for 548 yet. Be the first - use the “Report a scam call” form below to flag a number you've received. Approved reports appear here alongside FCC-recorded complaints.

How to block 548 spam calls (by carrier)

Getting repeated spam calls from 548 numbers around London, Ontario? You can't legitimately block every 548 call without also missing legitimate ones from London, Ontario - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.

AT&T

  1. Download the free AT&T ActiveArmor app (iOS + Android).
  2. Sign in with your wireless number.
  3. Enable Fraud Blocking and Suspected Spam Warning.
  4. To block a specific number, tap the call in your history → Block.

Verizon

  1. Download the free Verizon Call Filter app (iOS + Android).
  2. Sign in with your Verizon account.
  3. Turn on Spam Filter.
  4. To block a specific number: My Verizon → Blocks → Add Number.

T-Mobile

  1. Download the free Scam Shield app (iOS + Android).
  2. Enable Scam Block (blocks known scam calls silently).
  3. Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
  4. To block a specific number, dial #662# from your device.

All carriers

  1. Register on the FTC's National Do-Not-Call list.
  2. Report unwanted calls to the FCC at fcc.gov/complaints.
  3. On iPhone: Settings → Phone → Silence Unknown Callers.
  4. On Android: Phone app → ⋮ → Settings → Caller ID & spam.

Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.

History of the 548 area code

Area codes 519, 226, 548, and 382 are telephone overlay area codes in the North American Numbering Plan (NANP) for most of southwestern Ontario. Area code 519 was the initial code of the numbering plan area (NPA), an area that was established in 1953 in a remapping of the previous numbering plan areas in the region, namely the western portion of 416 and the southwestern portion of 613. The new numbering plan area was mostly bounded by area code 905, except for Simcoe County, which has the area code 705.

548 area code FAQ: common questions

What area code is 548?

Area code 548 is a North American Numbering Plan area code that serves Telephone area code for southwestern Ontario, Canada in Ontario, primarily including London and surrounding communities. It was activated in 1953.

Where does area code 548 cover?

Area code 548 covers Simcoe County, including cities such as London.

Is 548 a real area code or a scam?

548 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 548 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.

How do I block 548 spam calls?

You cannot legitimately block an entire area code without also blocking legitimate calls from London. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.

What's the overlay area code for 548?

548 shares coverage with overlay codes 519, 226, 382. That means new phone numbers issued in the same geographic area may have either area code, and 10-digit dialing is required.

Sources

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