Area codes · +1
Area code 781
Area code 781 is centred on Waltham, Massachusetts. We hold 6,252 allocated blocks for it across 40 rate centres, split 31% mobile, 54% landline and 15% VoIP.
The other area codes laid over 781
Area code 781 does not have Waltham to itself. 1 other code — 339 — serves the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
3391,113 blocks, 35 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 781 number and a 339 number from the same street can report different line types. Filtering Waltham by area code needs all 2 of them.
781 is not confined to Waltham itself: its blocks sit across 40 rate centres, named in the table below.
Massachusetts is split across 9 area codes — 978, 781, 774, 508, 413, 617 and others. By allocated blocks 781 is the second largest of them, holding 16% of the Massachusetts total.
Where 781 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Lynn is shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.
| Rate centre | Blocks | Share of 781 |
|---|---|---|
| Waltham | 531 | 8% |
| Lexington | 391 | 6% |
| Dedham | 323 | 5% |
| Burlington | 314 | 5% |
| Woburn | 309 | 5% |
| Braintree | 296 | 5% |
| Needham | 264 | 4% |
| Lynn | 242 | 4% |
| Canton | 216 | 3% |
| Medford | 195 | 3% |
| Weymouth | 193 | 3% |
| Malden | 175 | 3% |
| Randolph | 175 | 3% |
| Norwood | 166 | 3% |
| Rockland | 153 | 2% |
| Winchester | 145 | 2% |
| Revere | 144 | 2% |
| Wakefield | 136 | 2% |
| Hingham | 130 | 2% |
| Reading | 129 | 2% |
| Norwell | 123 | 2% |
| Saugus | 122 | 2% |
| Arlington | 120 | 2% |
| Kingston | 119 | 2% |
16 further rate centres in 781 hold fewer blocks than these.
Carriers holding the most 781 blocks
Verizon New England Inc.623 blocks
Verizon Wireless616 blocks
Onvoy536 blocks
Mcimetro Access Transmission Services Llc490 blocks
T-Mobile USA, Inc.360 blocks
Bandwidth311 blocks
No carrier holds more than 10% of 781; the blocks are spread thin across many companies.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 781 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 781 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 781?
Area code 781 covers Waltham, Massachusetts. It is not the only code there: 339 is an overlay on the same rate centres, so a Waltham, Massachusetts number can start with any of them.
Is a 781 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 781 the split runs 31% mobile, 54% landline and 15% VoIP, so landline is the most likely single answer.
Which carriers hold 781 numbers?
The largest holders are Verizon New England Inc., Verizon Wireless, Onvoy. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 781 numbers are there?
The code holds 6,252 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 781 covers on the order of 6,252,000 possible numbers — most of which have never been issued to anyone.