How many toll free numbers does Call Delivery Systems have?

Call Delivery Systems (KO) manages 97,180 active toll free numbers as of 2026-10, according to the Somos toll free registry tracked by Resporgs.com.

How do I request a specific toll free number from Call Delivery Systems?

Resporgs.com hosts a request form for Call Delivery Systems at https://resporgs.com/ask/KO. Fill in the number you want and your contact details. Bill Quimby reads every request and passes appropriate ones to the company that holds the number.

RespOrg directory

Call Delivery Systems

Q: What is Call Delivery Systems?

Call Delivery Systems is a US toll free Responsible Organization (RespOrg), code KO. Call Delivery Systems (RespOrg code KO) controls 97,180 US toll free numbers as of October 2026. That is down 17,096 (15%) since March 2018. Resporgs.com files it under Misdial Marketing. Based in Los Angeles, CA.

Misdial Marketing

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Call Delivery Systems (RespOrg code KO) controls 97,180 US toll free numbers as of October 2026. That is down 17,096 (15%) since March 2018. Resporgs.com files it under Misdial Marketing. Based in Los Angeles, CA.

Transfer network

How toll free numbers move between Call Delivery Systems (KO) and other Resp Orgs, reconstructed from Somos registry snapshots. Larger nodes = more transfer volume; Call Delivery Systems 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 Los Angeles, CA, street view, full size

Based in Los Angeles, CA, satellite, full size

Website: https://www.calldeliverysystems.com/ Domain since 2016 (10y)
Phone: (713) 338-2372 via web search: yellowpages.com

At a glance

Active numbers

97,180

#56 of 479

Change over 4 years

-17,096

-15.0% · #87 of 159

Opportunism Index

3.68%

#65 of 320

Vanity matches

59.8%

#22 of 207

Median inventory age

110 mo

9.2 years since last change
#27 of 207 oldest

Sub-codes in use

KOK04, KOK02, KOK01, KOK03, KOK07, KOK99

Inventory by NPA

Click any NPA for total pool inventory across the industry.

By status

WORKING 95,983, 98.8%
DISCONN 1,139, 1.2%
RESERVED 41, 0.0%
TRANSIT 2, 0.0%
UNAVAIL 1, 0.0%

Inventory age buckets

1–3 months 1,544, 1.1%
3–12 months 3,913, 2.9%
1–2 years 4,278, 3.2%
2–5 years 58, 0.0%
5+ years 86,190, 64.0%

Ages are measured from each number's last change in the Somos registry, that's the most recent activation, transfer, or status move. Not necessarily the date this RespOrg originally acquired it.

Request a manual history review of a specific toll free number →

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	114,276	0	0	0	0	0
2018-06	278,099	167,490	8	3,667	3,030	313
2018-09	124,671	19,072	2,524	172,500	1,061	4,161
2018-10	154,177	44,065	14	14,559	297	9,261
2018-11	114,166	5,098	66	45,109	4,732	0
2018-12	112,316	1,195	123	3,045	884	2,942
2019-01	109,527	1,106	57	3,895	870	2,106
2019-02	111,699	3,516	62	1,344	2,598	20
2019-03	109,110	1,153	4	3,742	557	3,555
2019-04	102,334	1,988	19	8,764	1,438	0
2019-05	103,649	1,320	11	5	1,276	3
2019-06	101,329	1,132	39	3,452	942	3,251
2019-08	92,513	2,572	68	11,388	958	11,380
2019-09	104,944	12,434	0	3	12,382	0
2019-10	103,704	2,630	30	3,870	1,443	363
2019-11	104,203	577	13	78	3	0
2019-12	104,508	317	6	12	161	0
2020-01	123,081	18,704	16	131	267	0
2020-02	130,112	7,031	0	0	524	0
2020-03	88,720	48	0	41,440	40	0
2020-04	85,473	0	0	3,247	0	0
2020-05	86,319	846	0	0	1	0
2020-06	86,318	0	0	1	0	0
2020-07	86,317	0	0	1	0	0
2020-08	86,317	0	0	0	0	0
2020-09	86,307	0	0	10	0	0
2020-10	86,307	0	0	0	0	0
2020-11	86,307	0	0	0	0	0
2020-12	86,296	0	0	11	0	0
2021-01	86,296	0	0	0	0	0
2021-02	86,296	0	0	0	0	0
2021-03	86,296	0	0	0	0	0
2021-04	86,289	1	0	8	0	0
2021-05	86,287	0	0	2	0	0
2022-05	86,308	39	0	18	0	0
2022-06	86,307	0	0	1	0	0
2022-07	86,307	0	0	0	0	0
2022-08	86,307	0	0	0	0	0
2022-09	86,307	0	0	0	0	0
2022-10	86,322	15	0	0	0	0
2022-11	86,322	0	0	0	0	0
2022-12	86,322	0	0	0	0	0
2023-01	86,322	0	0	0	0	0
2023-02	86,322	0	0	0	0	0
2023-03	86,333	11	0	0	0	0
2023-04	86,333	1	0	1	0	0
2023-05	86,333	0	0	0	0	0
2023-06	86,333	0	0	0	0	0
2023-07	86,307	1	0	27	0	0
2023-08	86,333	27	0	1	0	1
2023-09	86,333	0	0	0	0	0
2023-10	86,333	0	0	0	0	0
2023-11	86,333	0	0	0	0	0
2023-12	86,343	11	0	1	0	0
2024-02	86,334	1	0	10	0	0
2024-03	86,335	1	0	0	0	0
2024-04	86,335	0	0	0	0	0
2024-05	86,335	0	0	0	0	0
2024-06	86,344	9	0	0	0	0
2024-07	86,344	0	0	0	0	0
2024-08	86,343	0	0	1	0	0
2024-09	86,602	259	0	0	259	0
2024-10	86,343	0	0	259	0	0
2024-11	86,343	0	0	0	0	0
2024-12	86,343	0	0	0	0	0
2025-01	86,343	0	0	0	0	0
2025-02	86,343	0	0	0	0	0
2025-03	86,343	0	0	0	0	0
2025-04	86,343	0	0	0	0	0
2025-05	86,343	0	0	0	0	0
2025-06	86,343	0	0	0	0	0
2025-07	86,343	0	0	0	0	0
2025-08	86,627	284	26	0	0	0
2025-09	90,112	3,485	1,210	0	0	0
2025-10	96,870	6,759	4,985	1	0	0
2025-11	97,339	476	187	7	0	0
2025-12	97,595	416	154	160	0	0
2026-01	93,323	943	68	5,215	0	49
2026-02	94,090	1,492	378	725	0	0
2026-03	94,535	714	177	269	0	4
2026-04	96,049	1,831	334	317	0	240
2026-05	95,988	518	38	579	0	253
2026-06	95,660	471	156	799	0	128
2026-07	95,951	497	76	206	0	81
2026-08	96,004	1,157	184	1,104	0	664
2026-09	96,468	631	240	167	0	150
2026-10	97,180	959	242	247	0	209

Flow patterns (42-month cumulative)

Inbound (numbers acquired)

Direct transfer from another RespOrg	804,195.0
Harvested from disconnect pool	34,545.0
First assigned from spare pool	101,169.0
Reactivated own disconnects	1,107.0

Outbound (numbers lost)

Direct transfer to another RespOrg	1,133,340.0
Standard disconnect aging process (3+ months in DISC)	0
Abbreviated disconnect period (1–2 months in DISC)	11,248
Released directly to spare pool	156,536.0

Of the 11,248 disconnect episodes this RespOrg has sent through aging, 100% were abbreviated (1–2 snapshots in DISC status). That's a strong early-disconnector signal, this RespOrg routinely releases numbers before the full 3–4 month aging window. Worth checking daily for vanity drops.

Top direct-transfer sources (INto KO)

UF	120,051.0	Telesmart (NumHub)
AU	47,500.0	NumHub
QI	40,842.0	Telnyx
NW	24,754.0	NW
GJ	11,945.0	Bizwi
JY	3,229.0	Bandwidth
LQ	2,632.0	Inteliquent
NA	2,159.0	National Sales Partners
SO	1,679.0	Signal One
AT	1,601.0	AT&T

Top direct-transfer destinations (OUT of KO)

BR	93,826.0	Somos Help Desk (Somos)
PJ	63,765.0	Independent Resporg (NumHub)
QI	27,151.0	Telnyx
NW	25,646.0	NW
AU	22,636.0	NumHub
HT	18,398.0	Beta Texting
IW	11,838.0	Call8 (Kall8)
SO	4,326.0	Signal One
NA	3,111.0	National Sales Partners
VA	2,680.0	Vanity International

Summary

Wow a mass misdial marketing service with a real website that was started in 2018.

Top vanity holdings

Category:

888COMPANY 844INFORMATION 866INFORMATION 855ENTERTAINMENT 844STATION 844STATION 855ABANDONED 844PERSONAL 877PICTURE 877PICTURE 844IMPROVE 844IMPROVE 855HOLDERS 855GOLFERS 888PHARMAC 844SUPPLEMENTS 844CONCEPT 844CONCEPT 844STATION 866COMMERCIAL 800TECHNOLOGY 855TECHNOLOGY 844TECHNOLOGY 844CONTENT 855IN NATURE 844HOUSEOF 866AIRBONE 866 877ADAPTED 866FLORIST 855GOLFERS 877RETAILS 877CONTAINERS 855CANCELLED 844CONCEPT 800INSTRUCTION 888PHARMAC 877PLAYING 844CLIPPER 844CLIPPER 855CHECKIN 855CHECKGO 877INDIANA 877MEDICAN 877MEDICAM 844COMTRAC 844CONTRAC 844REAGENT 844 877ENFORCE 877ENFORCE 877INCLUDE 877INCLUDE 855BOOKBAG 855COOL CAH 855ADORE ME 855ADORE ME 844YDIHIHO 844WEIGHIN 866INFLECT

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