Area codes · +1
Area code 660
Area code 660 is centred on Sedalia, Missouri. We hold 3,175 allocated blocks for it across 224 rate centres, split 36% mobile, 41% landline and 24% VoIP.
The towns inside area code 660
Area code 660 is not a city code. It covers 224 separate rate centres — billing areas, each its own local calling zone. The largest of them are named in the table below.
That matters twice over. A call between two 660 numbers is not necessarily a local call, because they can sit in different rate centres. And a code this wide narrows a subscriber to a region rather than a town.
Missouri is split across 9 area codes — 573, 816, 314, 417, 636, 660 and others. By allocated blocks 660 is the 6th largest of them, holding 10% of the Missouri total.
Where 660 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Sweet Spg 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 660 |
|---|---|---|
| Sedalia | 219 | 7% |
| Kirksville | 152 | 5% |
| Clinton | 117 | 4% |
| Warrensbg | 103 | 3% |
| Moberly | 91 | 3% |
| Marshall | 90 | 3% |
| Chillicoth | 68 | 2% |
| Boonville | 66 | 2% |
| Butler | 66 | 2% |
| Maryville | 59 | 2% |
| Trenton | 49 | 2% |
| Warsaw | 49 | 2% |
| Knobnoster | 44 | 1% |
| Brookfield | 42 | 1% |
| Macon | 40 | 1% |
| Bethany | 39 | 1% |
| Lexington | 39 | 1% |
| Sweet Spg | 33 | 1% |
| Albany | 31 | 1% |
| Carrollton | 31 | 1% |
| Fayette | 31 | 1% |
| Waverly | 31 | 1% |
| Coal | 29 | 1% |
| Milan | 29 | 1% |
200 further rate centres in 660 hold fewer blocks than these.
Carriers holding the most 660 blocks
Onvoy420 blocks
AT&T Wireless243 blocks
Verizon Wireless227 blocks
Southwestern Bell202 blocks
Terra Nova Telecom Inc.149 blocks
Embarq Missouri, Inc. Dba Centurylink148 blocks
The largest holder, Onvoy, has 13% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 660 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 660 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 660?
Area code 660 is centred on Sedalia, Missouri and spans 224 rate centres, so it covers a region rather than a town.
Is a 660 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 660 the split runs 36% mobile, 41% landline and 24% VoIP, so landline is the most likely single answer.
Which carriers hold 660 numbers?
The largest holders are Onvoy, AT&T Wireless, Verizon Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 660 numbers are there?
The code holds 3,175 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 660 covers on the order of 3,175,000 possible numbers — most of which have never been issued to anyone.