Area codes · +1
Area code 821
Area code 821 covers Greenwood, South Carolina. We hold 350 allocated blocks for it across 16 rate centres, split 87% mobile, 0% landline and 13% VoIP.
The other area codes laid over 821
Area code 821 does not have Greenwood to itself. 1 other code — 864 — 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.
8646,207 blocks, 66 rate centres, mostly mobile
Each holds its own blocks and its own carrier mix, so a 821 number and a 864 number from the same street can report different line types. Filtering Greenwood by area code needs all 2 of them.
821 is not confined to Greenwood itself: its blocks sit across 16 rate centres, named in the table below.
South Carolina is split across 6 area codes — 864, 803, 843, 839, 854, 821. By allocated blocks 821 is the 6th largest of them, holding 2% of the South Carolina total.
Where 821 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Simpsonvl 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 821 |
|---|---|---|
| Greenwood | 124 | 35% |
| Laurens | 70 | 20% |
| Lauresrurl | 31 | 9% |
| Spartanbg | 30 | 9% |
| Greenville | 26 | 7% |
| Anderson | 17 | 5% |
| Simpsonvl | 13 | 4% |
| Williamstn | 7 | 2% |
| Clemson | 5 | 1% |
| Pacolet | 5 | 1% |
| Gaffney | 4 | 1% |
| Joanna | 4 | 1% |
| Landrum | 4 | 1% |
| Mccormick | 4 | 1% |
| Piedmont | 3 | 1% |
| Seneca | 3 | 1% |
Carriers holding the most 821 blocks
AT&T Wireless255 blocks
Onvoy31 blocks
Verizon Wireless18 blocks
Onvoy Spectrum8 blocks
Suncom Dba T-Mobile Usa7 blocks
Terra Nova Telecom Inc.6 blocks
AT&T Wireless alone holds 73% of every block in 821, 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 821 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 821 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 821?
Area code 821 covers Greenwood, South Carolina. It is not the only code there: 864 is an overlay on the same rate centres, so a Greenwood, South Carolina number can start with any of them.
Is a 821 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 821 the split runs 87% mobile, 0% landline and 13% VoIP, so mobile is the most likely single answer.
Which carriers hold 821 numbers?
The largest holders are AT&T Wireless, Onvoy, 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 821 numbers are there?
The code holds 350 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 821 covers on the order of 350,000 possible numbers — most of which have never been issued to anyone.