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
— 918-364 not yet reported which blocks → BIXBY TEL. CO., INC. 1969 BIXBY OK
— 918-365 not yet reported which blocks → BIXBY TEL. CO., INC. 1969 BIXBY OK
— 918-366 not yet reported which blocks → BIXBY TEL. CO., INC. 1969 BIXBY OK
— 918-367 0XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BRISTOW OK
— 918-368 not yet reported which blocks → CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 KENDRICK OK
— 918-369 not yet reported which blocks → BIXBY TEL. CO., INC. 1969 BIXBY OK
— 918-371 not yet reported which blocks → SOUTHWESTERN BELL 9533 COLLINSVL OK
— 918-372 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 RIPLEY OK
— 918-373 6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - OK 6272 PRYOR OK
— 918-374 not yet reported which blocks → CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 TRYON OK
— 918-375 none assigned yet which blocks → CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 AGRA OK
— 918-376 0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 OWASSO OK
— 918-377 not yet reported which blocks → CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 DAVENPORT OK
— 918-379 2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CATOOSA OK
— 918-381 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 TULSA OK
— 918-382 8XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-383 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 NEW HOME OK
— 918-384 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-386 none assigned yet which blocks → CONSOLIDATED COMMUNICATIONS OF OKLAHOMA COMPANY 1981 CEDARCREST OK
— 918-387 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 YALE OK
— 918-388 6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
— 918-389 not yet reported which blocks → CHEROKEE TEL. CO. 1979 ARPELAR OK
— 918-390 0XXX2XXX4XXX · 3 holders which blocks → NORTHEAST RURAL SERVICES, INC. - OK 945H SALINA OK
— 918-391 7XXX8XXX9XXX which blocks → CROSS WIRELESS, L.L.C. 148G MUSKOGEE OK
— 918-392 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J TULSA OK
— 918-393 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OK 409F MULDROW OK
— 918-394 4XXX which blocks → COMCAST IP PHONE, LLC 318J BIXBY OK
— 918-395 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J YALE OK
— 918-396 8XXX which blocks → SOUTHWESTERN BELL 9533 SKIATOOK OK
— 918-397 6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BARTLESVL OK
— 918-398 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
— 918-406 0XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-407 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-408 0XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-409 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-410 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OKLAHOMA WINDSTREAM, INC. 2011 STILWELL OK
— 918-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 918-412 0XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H BOKOSHE OK
— 918-419 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SAND SPG OK
— 918-420 1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MCALESTER OK
— 918-421 none assigned yet which blocks → SOUTHWESTERN BELL 9533 MCALESTER OK
— 918-422 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 WATTS OK
— 918-423 not yet reported which blocks → SOUTHWESTERN BELL 9533 MCALESTER OK
— 918-424 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCALESTER OK
— 918-425 8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-426 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 MCALESTER OK
— 918-427 not yet reported which blocks → SOUTHWESTERN BELL 9533 MULDROW OK
— 918-428 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-429 6XXX which blocks → SOUTHWESTERN BELL 9533 MCALESTER OK
— 918-430 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 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.