Area codes · +1
Area code 837
Area code 837 covers Redding, California. We hold 19 allocated blocks for it across 7 rate centres, split 0% mobile, 35% landline and 65% VoIP.
The other area codes laid over 837
Area code 837 does not have Redding to itself. 1 other code — 530 — 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.
5306,543 blocks, 131 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 837 number and a 530 number from the same street can report different line types. Filtering Redding by area code needs all 2 of them.
837 is not confined to Redding itself: its blocks sit across 7 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 837 and others. By allocated blocks 837 is the 40th largest of them, holding 0% of the California total.
Where 837 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Ntah Thcy and Shinglespg are 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 837 |
|---|---|---|
| Redding | 4 | 21% |
| Nevadacity | 3 | 16% |
| Ntah Thcy | 3 | 16% |
| Truckee | 3 | 16% |
| Chico | 2 | 11% |
| Red Bluff | 2 | 11% |
| Shinglespg | 2 | 11% |
Carriers holding the most 837 blocks
Onvoy7 blocks
Wide Voice, Llc6 blocks
Exiant Communications Llc4 blocks
Opentact Inc.2 blocks
Onvoy alone holds 37% of every block in 837, 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 837 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 837 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 837?
Area code 837 covers Redding, California. It is not the only code there: 530 is an overlay on the same rate centres, so a Redding, California number can start with any of them.
Is a 837 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 837 the split runs 0% mobile, 35% landline and 65% VoIP, so VoIP is the most likely single answer.
Which carriers hold 837 numbers?
The largest holders are Onvoy, Wide Voice, Llc, Exiant Communications Llc. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 837 numbers are there?
The code holds 19 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 837 covers on the order of 19,000 possible numbers — most of which have never been issued to anyone.