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 314
SOUTHWESTERN BELL 255
NEW CINGULAR WIRELESS PCS, LLC - IL 101
T-MOBILE USA, INC. 94
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 53
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 51
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 314-922 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-923 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-927 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-929 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-933 0XXX4XXX6XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-934 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ST LOUIS MO
— 314-935 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-938 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-941 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-943 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-945 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-950 not yet reported which blocks → MO
— 314-951 4XXX8XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-953 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-954 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-955 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
— 314-956 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-957 5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-958 not yet reported which blocks → MO
— 314-959 not yet reported which blocks → MO
— 314-960 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-961 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-962 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-963 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-964 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-965 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-966 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-968 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-971 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-972 none assigned yet which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-973 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-974 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-975 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX MO
— 314-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-977 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-982 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-983 8XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-984 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-985 4XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 CREVECOEUR MO
— 314-989 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-990 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-991 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-992 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-993 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-994 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-995 0XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-996 9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-997 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-999 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO

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.