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

MIDDLETON prefixes in area code 608

NANPA records 17 assigned NXX blocks to rate center MIDDLETON in area code 608, 2.2% of the 785 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 MID-PLAINS TEL., INC. (12), TDS METROCOM, LLC (3), CHARTER IP ENABLED SERVICES, LLC (1). The earliest assignment on record here is 2004-06-10 and the most recent 2011-08-19. 6 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 731, 989 – overlay codes cover the same geography, so a rate center is served by all of them.

17 assigned blocks – 2.2% of 608
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
608-203 TDS TDS METROCOM, LLC – yes yes
608-410 MID-PLAINS TEL., INC. 2004-06-10 yes yes
608-662 TDS TDS METROCOM, LLC – no yes
608-664 TDS TDS METROCOM, LLC – no yes
608-820 Charter CHARTER IP ENABLED SERVICES, LLC – yes yes
608-821 MID-PLAINS TEL., INC. – no yes
608-824 MID-PLAINS TEL., INC. – no yes
608-826 MID-PLAINS TEL., INC. – no yes
608-827 MID-PLAINS TEL., INC. – no yes
608-828 MID-PLAINS TEL., INC. – no yes
608-829 MID-PLAINS TEL., INC. – no yes
608-830 MID-PLAINS TEL., INC. 2005-05-24 yes yes
608-831 MID-PLAINS TEL., INC. – no yes
608-833 MID-PLAINS TEL., INC. – no yes
608-836 MID-PLAINS TEL., INC. – no yes
608-841 Onvoy ONVOY, LLC - WI – yes yes
608-858 MID-PLAINS TEL., INC. 2011-08-19 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
MID-PLAINS TEL., INC. – 12 70.6%
TDS METROCOM, LLC TDS 3 17.6%
CHARTER IP ENABLED SERVICES, LLC Charter 1 5.9%
ONVOY, LLC - WI Onvoy 1 5.9%

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 MIDDLETON in area code 608?

17 blocks: 203, 410, 662, 664, 820, 821, 824, 826, 827, 828, 829, 830 and 5 more, all listed in the table above.

Which carriers have numbers in MIDDLETON?

MID-PLAINS TEL., INC. (12 blocks), TDS METROCOM, LLC (3 blocks), CHARTER IP ENABLED SERVICES, LLC (1 block), ONVOY, LLC - WI (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MIDDLETON 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 608

All 785 prefixes in 608