Quick answer
The 519 area code serves London, Ontario in the Eastern Time (ET) (UTC-5 / UTC-4 DST). Assigned in 1953, it covers Southwestern Ontario including London, Windsor, Kitchener. Overlay codes: 226, 548.
- Region
- Southwestern Ontario, ON
- Time zone
- ET (UTC-5)
- Assigned
- 1953
- Population
- ~2,500,000
- Local time now
- · live
What is the area code for London?
The area code for London, Ontario is 519, with overlay codes 226, 548 sharing the same geographic footprint. The 519 area code is a North American Numbering Plan geographic code assigned in 1953, covering the Southwestern Ontario region. It serves approximately 2,500,000 residents on the Eastern Time (ET) (UTC-5 / UTC-4 DST).
All London area codes
London is served by 3 area codes across the metro area. 519 is the 1953 addition; the others were added as overlays or for surrounding suburbs.
Cities served by the 519 area code
The 519 area code covers 5 major cities and towns across the Southwestern Ontario region (ON):
Businesses across London and surrounding cities use 519 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.
519 area code time zone and business hours
The 519 area code is in the Eastern Time (ET) zone (UTC-5 / UTC-4 DST). Standard business hours in 519 run 9 AM to 5 PM ET.
If you're calling into 519 from a different time zone, factor in the offset. For example, an Eastern Time business calling 519 at 9 AM ET reaches London at local time — likely outside standard business hours.
History of the 519 area code
The 519 area code was introduced in 1953 when the North American Numbering Plan was first deployed. As London grew and number demand increased, overlay codes 226, 548 were added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.
- 1953 519 entered service
- 2006 226 added to serve the same region
- 2019 548 added to serve the same region
Is the 519 area code safe? Spam and scam calls
519 is a legitimate geographic area code for London — it is not a scam code or a premium-rate prefix, and a call from a 519 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.
If you get an unexpected 519 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Insurance Number, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the Canadian Anti-Fraud Centre at antifraudcentre-centreantifraude.ca. The CRTC guide on caller ID spoofing explains your rights under Canada's STIR/SHAKEN caller-ID authentication framework. A real London business will leave a clear voicemail and will not pressure you.
US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 519 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.
Why get a 519 area code number for your business?
Getting a 519 number gives your business three measurable advantages over a toll-free or out-of-area number:
- Local trust signal. Customers in London recognize 519 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
- Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
- Targeted marketing. Businesses serving London and the broader Southwestern Ontario can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.
For businesses in London and surrounding cities, top industries that benefit from local 519 presence include Professional Services, Healthcare, and Retail. DialPhone's AI receptionist is available for every 519 number — never miss a call, even after standard business hours.
How to get a 519 area code number
Setting up a 519 business number with DialPhone takes under 10 minutes:
- Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
- Search available 519 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
- Choose your number and configure. Assign your new 519 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
- Port your existing number (optional). Already have a 519 number? Free number porting in 2 to 5 business days with zero service interruption.
New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.
519 area code overlay codes
The Southwestern Ontario region is served by multiple overlay area codes:
| Area Code | Coverage |
|---|---|
| 519 | Primary area code for Southwestern Ontario, assigned 1953 |
| 226 | Overlay — same geography (assigned 2006) |
| 548 | Overlay — same geography (assigned 2019) |
All overlay codes serve the same London region. New subscribers may be assigned any available code; existing numbers retain their original prefix.
AI receptionist for 519 area code businesses
Every DialPhone 519 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.
For businesses in London that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.
All area codes in Ontario
Ontario has 11 active geographic area codes. The 519 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.
Nearby area codes
Related area codes in Ontario and the Eastern Time (ET) region:
- 416 area code — Toronto, Ontario
- 647 area code — Toronto, Ontario
- 437 area code — Toronto, Ontario
- 905 area code — Mississauga, Ontario
- 289 area code — Mississauga, Ontario
- 365 area code — Mississauga, Ontario
All Ontario area codes → · Browse all US area codes →
More area codes: ← 518 Albany · 520 Tucson →
How We Tested
DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 519 region.
What We Don't Like
- Number availability is finite. Popular London area codes can be inventory-constrained — request specific vanity patterns early.
- Porting timing varies. Most 519 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
- HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.