Area codes · +1
Area code 847
Area code 847 is centred on Northbrook, Illinois. We hold 4,726 allocated blocks for it across 46 rate centres, split 24% mobile, 71% landline and 6% VoIP.
The other area codes laid over 847
Area code 847 does not have Northbrook to itself. 2 other codes — 224, 630 — serve 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.
Each holds its own blocks and its own carrier mix, so a 847 number and a 224 number from the same street can report different line types. Filtering Northbrook by area code needs all 3 of them.
847 is not confined to Northbrook itself: its blocks sit across 46 rate centres, named in the table below.
Illinois is split across 17 area codes — 224, 618, 708, 815, 217, 847 and others. By allocated blocks 847 is the 9th largest of them, holding 7% of the Illinois total.
Where 847 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Arligtnhts and Libertyvl 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 847 |
|---|---|---|
| Northbrook | 642 | 14% |
| Roselle | 426 | 9% |
| Elk Grove | 246 | 5% |
| Arligtnhts | 218 | 5% |
| Desplaines | 212 | 4% |
| Wheeling | 180 | 4% |
| Skokie | 170 | 4% |
| Waukegan | 170 | 4% |
| Deerfield | 149 | 3% |
| Park Ridge | 149 | 3% |
| Evanston | 140 | 3% |
| Elgin | 133 | 3% |
| Palatine | 133 | 3% |
| Libertyvl | 120 | 3% |
| Half Day | 113 | 2% |
| Lakezurich | 112 | 2% |
| Lakeforest | 105 | 2% |
| Franklinpk | 101 | 2% |
| Bensenvl | 99 | 2% |
| Glenview | 91 | 2% |
| Dundee | 90 | 2% |
| Barrington | 84 | 2% |
| Highlandpk | 70 | 1% |
| Winnetka | 68 | 1% |
22 further rate centres in 847 hold fewer blocks than these.
Carriers holding the most 847 blocks
Illinois Bell1,374 blocks
T-Mobile Usa, Inc.438 blocks
Level 3 Communications, Llc - Il (Centurylink, Inc)289 blocks
Mcimetro Access Transmission Services Llc283 blocks
T-Mobile USA, Inc.236 blocks
AT&T Wireless231 blocks
The largest holder, Illinois Bell, has 29% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 847 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 847 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 847?
Area code 847 covers Northbrook, Illinois. It is not the only code there: 224, 630 are overlays on the same rate centres, so a Northbrook, Illinois number can start with any of them.
Is a 847 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 847 the split runs 24% mobile, 71% landline and 6% VoIP, so landline is the most likely single answer.
Which carriers hold 847 numbers?
The largest holders are Illinois Bell, T-Mobile Usa, Inc., Level 3 Communications, Llc - Il (Centurylink, Inc). That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 847 numbers are there?
The code holds 4,726 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 847 covers on the order of 4,726,000 possible numbers — most of which have never been issued to anyone.