NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

TIFFIN prefixes in area code 419

NANPA records 7 assigned NXX blocks to rate center TIFFIN in area code 419, 0.9% of the 783 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 4 holders hold those blocks, the largest being OHIO BELL TEL CO (4), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH (1), AMERICAN MESSAGING SERVICES, LLC (1). The earliest assignment on record here is 2023-07-26 and the most recent 2023-07-26. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 319, 567 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 0.9% of 419
4 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
419-443 AT&T OHIO BELL TEL CO – yes yes
419-447 AT&T OHIO BELL TEL CO – no yes
419-448 AT&T OHIO BELL TEL CO – no yes
419-455 AT&T OHIO BELL TEL CO – yes yes
419-618 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH – no yes
419-805 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
419-839 Onvoy ONVOY, LLC - OH 2023-07-26 yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
OHIO BELL TEL CO AT&T 4 57.1%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH Verizon 1 14.3%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 14.3%
ONVOY, LLC - OH Onvoy 1 14.3%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to TIFFIN in area code 419?

7 blocks: 443, 447, 448, 455, 618, 805, 839. The table above gives the holder of each.

Which carriers have numbers in TIFFIN?

OHIO BELL TEL CO (4 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH (1 block), AMERICAN MESSAGING SERVICES, LLC (1 block), ONVOY, LLC - OH (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is TIFFIN a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 419

All 783 prefixes in 419