Area codes · +1
Area code 353
Area code 353 covers Madison, Wisconsin. We hold 74 allocated blocks for it across 11 rate centres, split 20% mobile, 3% landline and 77% VoIP.
The other area codes laid over 353
Area code 353 does not have Madison to itself. 1 other code — 608 — 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.
6085,751 blocks, 159 rate centres, mostly mobile
Each holds its own blocks and its own carrier mix, so a 353 number and a 608 number from the same street can report different line types. Filtering Madison by area code needs all 2 of them.
353 is not confined to Madison itself: its blocks sit across 11 rate centres, named in the table below.
Wisconsin is split across 8 area codes — 920, 608, 715, 262, 414, 353 and others. By allocated blocks 353 is the 8th largest of them, holding 0% of the Wisconsin total.
Where 353 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Centervl 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 353 |
|---|---|---|
| Madison | 31 | 42% |
| Belleville | 7 | 9% |
| Lone Rock | 6 | 8% |
| Montello | 5 | 7% |
| Albany | 4 | 5% |
| Bloom City | 4 | 5% |
| Centervl | 4 | 5% |
| De Forest | 4 | 5% |
| Mazomanie | 4 | 5% |
| Ithaca | 3 | 4% |
| Highland | 2 | 3% |
Carriers holding the most 353 blocks
Onvoy46 blocks
Verizon Wireless12 blocks
Bandwidth4 blocks
Hd Carrier Llc3 blocks
T-Mobile Usa, Inc.2 blocks
Ahoi Llc2 blocks
Onvoy alone holds 62% of every block in 353, which is unusually concentrated for an area code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 353 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 353 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 353?
Area code 353 covers Madison, Wisconsin. It is not the only code there: 608 is an overlay on the same rate centres, so a Madison, Wisconsin number can start with any of them.
Is a 353 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 353 the split runs 20% mobile, 3% landline and 77% VoIP, so VoIP is the most likely single answer.
Which carriers hold 353 numbers?
The largest holders are Onvoy, Verizon Wireless, Bandwidth. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 353 numbers are there?
The code holds 74 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 353 covers on the order of 74,000 possible numbers — most of which have never been issued to anyone.