NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 918
SOUTHWESTERN BELL 236
NEW CINGULAR WIRELESS PCS, LLC - IL 93
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 50
T-MOBILE USA, INC. 49
VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 36
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
2012-03-14 918-861 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-891 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-896 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-934 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-982 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-13 918-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-08 918-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-02-13 918-480 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SPERRY OK
2012-01-12 918-817 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SALLISAW OK
2011-12-27 918-802 not yet reported which blocks → BTC BROADBAND, INC. 669B RAMONA OK
2011-11-23 918-884 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2011-11-16 918-312 0–9 XXXall 10 · 2 holders which blocks → PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC. 235C TULSA OK
2011-11-14 918-927 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-11-02 918-849 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-10-18 918-240 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-10-17 918-264 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-09-14 918-210 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-09-12 918-380 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BRAGGS OK
2011-07-11 918-565 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2011-05-26 918-613 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-05-13 918-887 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 COWETA OK
2011-04-21 918-892 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2011-03-18 918-936 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
2011-02-14 918-710 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-01-25 918-644 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2011-01-17 918-804 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2010-10-25 918-924 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2010-10-04 918-505 0–9 XXXall 10 · 6 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
2010-07-16 918-226 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 KANSAS OK
2010-02-19 918-236 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK 7632 TULSA OK
2010-01-18 918-886 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C BARTLESVL OK
2009-12-08 918-265 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BOKOSHE OK
2009-09-22 918-550 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2009-04-29 918-736 0XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → BTC BROADBAND, INC. 669B HASKELL OK
2009-03-04 918-508 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2009-01-12 918-935 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2008-12-29 918-805 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2008-09-17 918-991 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2008-06-19 918-960 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2008-05-13 918-994 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BROKENARRW OK
2008-03-25 918-899 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2008-03-25 918-933 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2008-02-27 918-995 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C JENKS OK
2008-01-07 918-895 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2007-10-31 918-953 0XXX1XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ADAIR OK
2007-10-30 918-418 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 VINITA OK
2007-09-07 918-894 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2007-08-22 918-983 0XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONROEHOWE OK
2007-07-13 918-859 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2007-07-13 918-978 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.