NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 256
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 180
NEW CINGULAR WIRELESS PCS, LLC - GA 114
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 84
PAETEC ITEL, LLC 58
POWERTEL BIRMINGHAM LICENSES, INC. 49
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2017-03-31 256-836 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HUNTSVILLE AL
2017-01-09 256-860 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E GUNTERSVL AL
2016-10-03 256-913 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 JACKSONVL AL
2016-09-12 256-814 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SHEFFIELD AL
2016-09-08 256-815 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RUSSELLVL AL
2016-07-28 256-804 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HAZELGREEN AL
2016-07-19 256-800 0–9 XXXall 10 · 6 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ATHENS AL
2016-06-23 256-802 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F ROGERSVL AL
2016-06-23 256-803 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F BOAZ AL
2016-03-17 256-291 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E RUSSELLVL AL
2016-02-17 256-787 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E HANCEVILLE AL
2015-11-25 256-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2015-09-25 256-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GURLEY AL
2015-05-15 256-407 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → FARMERS TELECOMMUNICATIONS CORPORATION - AL 947D CENTRE AL
2015-03-11 256-980 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FLORENCE AL
2015-01-23 256-907 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F BOAZ AL
2015-01-10 256-290 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOULTON AL
2014-10-13 256-973 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2014-07-02 256-826 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SHEFFIELD AL
2014-03-11 256-843 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ARAB AL
2013-12-12 256-801 0–9 XXXall 10 · 7 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J HUNTSVILLE AL
2013-04-15 256-203 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HUNTSVILLE AL
2013-02-26 256-923 1XXX2XXX3XXX5XXX · 3 holders which blocks → PEOPLES TEL. CO., INC. 0314 CENTRE AL
2013-02-13 256-808 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G HUNTSVILLE AL
2012-08-20 256-530 0–9 XXXall 10 · 5 holders which blocks → DOVETEL COMMUNICATIONS LLC - AL 799G ANNISTON AL
2012-08-20 256-540 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → DOVETEL COMMUNICATIONS LLC - AL 799G WEDOWEE AL
2012-07-09 256-336 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS LLC - AL 7451 HUNTSVILLE AL
2012-02-23 256-662 0–9 XXXall 10 · 5 holders which blocks → FARMERS TELECOMMUNICATIONS CORPORATION - AL 947D VALLEYHEAD AL
2012-01-12 256-202 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 GUNTERSVL AL
2012-01-12 256-224 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 ARAB AL
2011-09-13 256-284 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F FLORENCE AL
2011-05-10 256-600 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F JACKSONVL AL
2010-10-15 256-978 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 SHEFFIELD AL
2010-10-08 256-440 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FYFFE AL
2010-10-06 256-269 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DADEVILLE AL
2010-06-21 256-943 1XXX4XXX · 2 holders which blocks → MCC TELEPHONY LLC 593K ARDMORE AL
2010-06-08 256-924 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HUNTSVILLE AL
2010-05-19 256-985 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY LLC 593K NEW MARKET AL
2010-04-27 256-926 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HEFLIN AL
2010-04-21 256-929 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K HUNTSVILLE AL
2010-04-02 256-979 0–9 XXXall 10 · 5 holders which blocks → FARMERS TELECOMMUNICATIONS CORPORATION - AL 947D FORT PAYNE AL
2010-02-15 256-970 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J HUNTSVILLE AL
2010-01-15 256-919 0–9 XXXall 10 · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ARAB AL
2009-12-22 256-733 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MUNFORD AL
2009-12-22 256-857 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C ALBERTVL AL
2009-12-21 256-945 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C HUNTSVILLE AL
2009-11-12 256-960 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 GUNTERSVL AL
2009-05-15 256-937 0–9 XXXall 10 · 5 holders which blocks → FARMERS TELECOMMUNICATIONS CORPORATION - AL 947D HUNTSVILLE AL
2009-04-23 256-925 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FARMERS TELECOMMUNICATIONS CORPORATION - AL 947D CROSSVILLE AL
2009-02-18 256-790 0XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CAMP HILL AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.