Area codes in Missouri

Missouri has 9 area codes, per NANPA’s NPA report of 2026-09-27. The NANPA central office code report of 2026-09-27 lists 4,168 allocated central office codes there across 721 rate centres, 78.5% of them pooled; 82 were assigned in the twelve months from 2025-09-28.

The area codes of Missouri

Each code with the place its page names, the year or day NANPA’s NPA report puts it in service, the codes it shares its area with, and the central office codes the NANPA central office code report allocates under it whose rate centre is in Missouri. A rate centre is where the regulator recorded a code, not where a subscriber is.

code	place	in service	overlays	codes here	assigned, 12 months
235	—	2024-03-24	573	41	17
314	—	1947	557	783	1
417	—	1950	—	711	9
557	—	2022-08-12	314	83	24
573	—	1996-01-07	235	786	0
636	—	1999-05-22	—	435	6
660	—	1997-10-12	—	516	4
816	Kansas City, MO	1947	975	785	0
975	—	2023-10-13	816	28	21

A year alone means NANPA’s date is 1 January of that year, which it uses where it records no day.

Overlays and new area codes

235 and 573 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
314 and 557 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
816 and 975 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.

What the NANPA central office code report holds for Missouri

area codes	9
allocated codes	4,168 central office codes, 10,000 numbers each
rate centres	721
pooled codes	3,272 (78.5%)
codes assigned since 2025-09-28	82
thousands-blocks assigned since 2025-09-28	1,126

A pooled code is split into thousands-blocks of 1,000 numbers that other carriers may hold. The twelve months run to the table’s own date, so the figures change only when the table does.

Allocated codes by network brand

Each code is counted under the holder the NANPA central office code report lists for it, grouped under today’s network brand. That is the code’s original allocation, never who serves a number today, since numbers move between carriers, and the shares are shares of the regulator’s table, not of subscribers or traffic. In a pooled code the thousands-blocks can be held by other carriers; this counts the code’s holder.

brand	codes	share
AT&T	1,420	34.1%
T-Mobile	401	9.6%
Verizon	391	9.4%
Inteliquent	383	9.2%
Brightspeed	294	7.1%
Lumen	243	5.8%
Windstream	178	4.3%
Bandwidth	70	1.7%
Not under a listed brand (88 holders)	788	18.9%

Where these figures come from

The codes, rate centres, pooling and assignment dates are counted from the NANPA central office code report of 2026-09-27, and the area codes, overlays and in-service dates from NANPA’s NPA report of 2026-09-27. Counts only: no row of either file is republished here. The publisher, its files and its terms are on the data source page. Every area code of the United States is on the United States page, the codes put in service lately or still to come across North America on new and upcoming area codes, and any number can be read on the free phone number lookup.

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