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

GOLCONDA prefixes in area code 618

NANPA records 3 assigned NXX blocks to rate center GOLCONDA in area code 618, 0.4% of the 786 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. 3 holders hold those blocks, the largest being TELNYX LLC (1), ONVOY, LLC (1), FRONTIER NORTH, INC. - IL (1). The earliest assignment on record here is 2018-08-01 and the most recent 2019-12-09. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 618
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
618-209 Telnyx TELNYX LLC 2019-12-09 yes yes
618-668 Onvoy ONVOY, LLC 2018-08-01 yes yes
618-683 Frontier FRONTIER NORTH, INC. - IL – 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
TELNYX LLC Telnyx 1 33.3%
ONVOY, LLC Onvoy 1 33.3%
FRONTIER NORTH, INC. - IL Frontier 1 33.3%

Frequently asked

Which prefixes belong to GOLCONDA in area code 618?

3 blocks: 209, 668, 683. The table above gives the holder of each.

Which carriers have numbers in GOLCONDA?

TELNYX LLC (1 block), ONVOY, LLC (1 block), FRONTIER NORTH, INC. - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GOLCONDA 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 618

All 786 prefixes in 618