620
Area code
Statusin service
Introduced2001-02-03
JurisdictionKS, US
Local dialing10D
Time zoneCentral / Mountain
Last verified2026-09-17
Utilization 90.8% of assignable prefixes assigned
As of 09/17/2026
0%719 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2001-01-29, most recent 2026-01-07.
Area codes serve rate-center geographies, not municipal boundaries. “KS” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | SOUTHWESTERN BELL | 149 | 20.7% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 59 | 8.2% |
| 03 | UNITED TEL OF EASTERN KANSAS DBA CENTURYLINK | 44 | 6.1% |
| 04 | LEVEL 3 COMMUNICATIONS, LLC - KS | 41 | 5.7% |
| 05 | NEW CINGULAR WIRELESS PCS, LLC - IL | 32 | 4.5% |
| 06 | ONVOY, LLC - KS | 30 | 4.2% |
| 07 | CRAW-KAN TEL. COOP.,INC. - KS | 25 | 3.5% |
| 08 | TON80 COMMUNICATIONS, LLC | 23 | 3.2% |
| 09 | UNITED STATES CELLULAR - KS | 21 | 2.9% |
| 10 | PIONEER TEL. ASSN., INC. | 20 | 2.8% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 2001-02-03Area code 620 entered service (created from 316).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-01-08 | PL-556 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| 2020-08-17 | PL-544 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |
| 2000-10-26 | PL-245 ↗ | 316 Numbering Plan Area (NPA) Split, Creating 620 NPA (Kansas) |