What is Lumen Technologies?

Lumen Technologies is a US toll free Responsible Organization (RespOrg) identified by code FG. They manage and assign toll free numbers on behalf of business customers.

How many toll free numbers does Lumen Technologies have?

Lumen Technologies (FG) manages 14 active toll free numbers as of 2026-06, according to the Somos toll free registry tracked by Resporgs.com.

How do I request a specific toll free number from Lumen Technologies?

Resporgs.com hosts a request form for Lumen Technologies at https://resporgs.com/ask/FG. Fill in the number you want and your contact details; we'll route the request to the appropriate party.

RespOrg directory

Lumen Technologies

alias: Century Link

Large Telcom Dormant Group: Lumen

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Transfer network

How toll free numbers move between Lumen Technologies (FG) and other Resp Orgs, reconstructed from Somos registry snapshots. Larger nodes = more transfer volume; Lumen Technologies is highlighted. Open the full interactive map →

Scroll to zoom, drag to pan, drag a node to reposition.

Transfer Funnel (acquired at a drop, then moved on) Off-hours fast pickup

Website, visit, full size

Based in Arlington Heights, IL, street view, full size

Based in Arlington Heights, IL, satellite, full size

Website: centurylink.com Domain since 2006 (20y)
Phone: (877) 453-8353 via web search: lumen.com
👥 Shared address (5 resporgs)

At a glance

Active numbers

#402 of 481

Change over 4 years

-1,039

-98.7%

Opportunism Index

0.19%

#215 of 320

Sub-codes in use

FGC01

Dormant RespOrg

This phone company is dead or nearly dead, almost zero numbers and little or no activity. Sometimes called a "zombie" RespOrg because they just won't die.

Last seen with active numbers: 2026-01. Nothing in any monthly snapshot since.

The trajectory chart below shows the full history. The code may have been transferred, retired, or reassigned to a new operator that hasn't begun activating numbers yet.

Trajectory

Total active inventory Numbers harvested from disconnect pool that month

Show monthly numbers

Month	Inventory	Acquired	Harvested	Lost	From spare	To spare
2018-03	1,053	0	0	0	0	0
2018-06	1,053	0	0	0	0	0
2018-09	1,053	0	0	0	0	0
2018-10	1,053	0	0	0	0	0
2018-11	1,053	0	0	0	0	0
2018-12	1,053	0	0	0	0	0
2019-01	1,053	0	0	0	0	0
2019-02	1,053	0	0	0	0	0
2019-03	1,053	0	0	0	0	0
2019-04	1,053	0	0	0	0	0
2019-05	1,053	0	0	0	0	0
2019-06	1,053	0	0	0	0	0
2019-08	599	0	0	454	0	454
2019-09	1,053	454	0	0	454	0
2019-10	1,053	0	0	0	0	0
2019-11	1,053	0	0	0	0	0
2019-12	1,053	0	0	0	0	0
2020-01	1,053	0	0	0	0	0
2020-02	14	0	0	1,039	0	0
2020-03	14	0	0	0	0	0
2020-04	14	0	0	0	0	0
2020-05	14	0	0	0	0	0
2020-06	14	0	0	0	0	0
2020-07	14	0	0	0	0	0
2020-08	14	0	0	0	0	0
2020-09	14	0	0	0	0	0
2020-10	14	0	0	0	0	0
2020-11	14	0	0	0	0	0
2020-12	14	0	0	0	0	0
2021-01	14	0	0	0	0	0
2021-02	14	0	0	0	0	0
2021-03	14	0	0	0	0	0
2021-04	14	0	0	0	0	0
2021-05	14	0	0	0	0	0
2022-05	14	0	0	0	0	0
2022-06	14	0	0	0	0	0
2022-07	14	0	0	0	0	0
2022-08	14	0	0	0	0	0
2022-09	14	0	0	0	0	0
2022-10	514	500	0	0	490	0
2022-11	514	0	0	0	0	0
2022-12	514	0	0	0	0	0
2023-01	514	0	0	0	0	0
2023-02	14	0	0	500	0	375
2023-03	14	0	0	0	0	0
2023-04	14	0	0	0	0	0
2023-05	14	0	0	0	0	0
2023-06	2,078	2,064	0	0	2,064	0
2023-07	14	0	0	2,064	0	1,909
2023-08	138	124	6	0	43	0
2023-09	138	0	0	0	0	0
2023-10	138	0	0	0	0	0
2023-11	138	0	0	0	0	0
2023-12	138	0	0	0	0	0
2024-02	138	0	0	0	0	0
2024-03	138	0	0	0	0	0
2024-04	138	0	0	0	0	0
2024-05	138	0	0	0	0	0
2024-06	138	0	0	0	0	0
2024-07	138	0	0	0	0	0
2024-08	138	0	0	0	0	0
2024-09	138	0	0	0	0	0
2024-10	138	0	0	0	0	0
2024-11	138	0	0	0	0	0
2024-12	138	0	0	0	0	0
2025-01	138	0	0	0	0	0
2025-02	138	0	0	0	0	0
2025-03	138	0	0	0	0	0
2025-04	138	0	0	0	0	0
2025-05	138	0	0	0	0	0
2025-06	138	0	0	0	0	0
2025-07	138	0	0	0	0	0
2025-08	138	0	0	0	0	0
2025-09	138	0	0	0	0	0
2025-10	138	0	0	0	0	0
2025-11	138	0	0	0	0	0
2025-12	138	0	0	0	0	0
2026-01	138	0	0	0	0	0
2026-02	14	0	0	124	0	0
2026-03	14	0	0	0	0	0
2026-04	14	0	0	0	0	0
2026-05	14	0	0	0	0	0
2026-06	14	0	0	0	0	0

Flow patterns (42-month cumulative)

Inbound (numbers acquired)

Direct transfer from another RespOrg	255.0
Harvested from disconnect pool	18.0
First assigned from spare pool	9,153.0
Reactivated own disconnects	0.0

Outbound (numbers lost)

Direct transfer to another RespOrg	3,957.0
Standard disconnect aging process (3+ months in DISC)	124
Abbreviated disconnect period (1–2 months in DISC)	0
Released directly to spare pool	8,214.0

Of the 124 disconnect episodes this RespOrg has sent through aging, 0% were abbreviated (1–2 snapshots in DISC status). This RespOrg lets most numbers age the full 3–4 months before release, normal pattern.

Top direct-transfer sources (INto FG)

YC	30.0	Marchex
GA	15.0	Comet Media
PY	11.0	Fractel
OU	8.0	CallSource
KS	8.0	Lumen Technologies (Lumen)
WG	6.0	Immediate Services LLC
LQ	3.0	Inteliquent
AT	1.0	AT&T
IG	1.0	Genesys Telecom
HP	1.0	Inteliquent

Top direct-transfer destinations (OUT of FG)

KS	1,060.0	Lumen Technologies (Lumen)
GA	134.0	Comet Media
YC	30.0	Marchex
QI	25.0	Telnyx
OU	17.0	CallSource
WG	15.0	Immediate Services LLC
PY	11.0	Fractel
LQ	7.0	Inteliquent
OM	7.0	Intrado Communications (Intrado)
AT	3.0	AT&T

Summary

Formerly Century Link, among other names, Lumen is a large telecom company that's grown through numerous acquisitions and of course has multiple resporgs and systems and probably numerous numbers lost in the cracks. They also work with a number of resellers, though not as much as they used to. This makes finding the right segment of the company and the actual company providing the service especially hard.

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with Lumen Technologies

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