Telecommunications
21 columns
501 rows
8 formats

Voice Call Detail Records (CDR) - Circuit Switched

This dataset provides comprehensive voice call detail records from legacy 2G/3G telecommunications networks, including subscriber identifiers, device information, call timings, cell tower locations, call termination causes, and detailed billing charges. It is ideal for telecom billing, fraud detection, network optimization, and regulatory compliance analysis.

opened 18 times
last updated 1 Nov 2025
by GoMask

The brief that made it

Billing reconciliation and charge calculation

Sample rows

preview · 8 of 501 rows · all 21 columns

cdr_idstring	call_termination_causestring	toll_chargefloat	is_roamingboolean	currencystring	call_start_timedatetime	call_end_timedatetime	call_duration_secondsinteger	calling_numberstring	called_numberstring	calling_imsistring	calling_imeistring	called_imsistring	called_imeistring	calling_cell_idstring	called_cell_idstring	roaming_chargefloat	network_typestring	call_directionstring	billing_account_idstring	fraud_flagboolean
GB-20240605-01A	normal	3.12	false	GBP	2024-06-05T08:13:00Z	2024-06-05T08:17:25Z	265	+447865432101	+447912345678	234150987654321	356789123456789	234150123456789	354321987654321	London-Cell-1001	London-Cell-1023	0	3G	outgoing	BA10001	false
US-20240605-02B	normal	45.57	true	USD	2024-06-05T16:45:30Z	2024-06-05T17:05:30Z	1200	+12025550101	+13105550102	310150123456789	352001234567890	310150234567890	354001987654321	NYC-Cell-5002	LA-Cell-7005	35.1	3G	outgoing	BA10002	false
IN-20240605-03C	busy	0	false	blank	2024-06-05T05:55:00Z	2024-06-05T05:55:02Z	2	+919876543210	+919812345678	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
DE-20240604-04D	normal	4.63	false	EUR	2024-06-04T14:20:10Z	2024-06-04T14:26:10Z	360	+4915123456789	+4917623456789	262011234567890	358123456789012	262015678901234	359876543210987	Berlin-Cell-2100	Munich-Cell-2150	0	3G	incoming	BA10003	false
FR-20240605-05E	failed	0	false	blank	2024-06-05T10:00:00Z	2024-06-05T10:00:01Z	1	+33612345678	+33698765432	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
GB-20240605-06F	normal	150.6	true	GBP	2024-06-05T12:30:00Z	2024-06-05T15:30:00Z	10800	+447812345679	+447912345679	234151234567890	353456789012345	234159876543210	357654321098765	Manchester-Cell-3032	London-Cell-1051	120.1	3G	outgoing	BA10004	true
US-20240605-07G	normal	6.41	false	USD	2024-06-05T18:45:00Z	2024-06-05T18:53:30Z	510	+12025550103	+12025550104	310150345678901	352002345678901	310150456789012	355001234567890	LA-Cell-7021	NYC-Cell-5011	0	2G	incoming	BA10005	false
CA-20240605-08H	dropped	0.15	false	CAD	2024-06-05T21:10:00Z	2024-06-05T21:10:47Z	47	+14165550105	+14165550106	302720123456789	351001234567890	302720234567890	351002345678901	Toronto-Cell-9101	Montreal-Cell-8502	0	2G	outgoing	blank	false
GB-20240605-09J	unknown	0	false	blank	2024-06-05T07:03:00Z	2024-06-05T07:03:10Z	10	+447865432102	+447912345680	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
IN-20240605-10K	normal	3	false	INR	2024-06-05T06:35:00Z	2024-06-05T06:39:47Z	287	+919876543211	+919812345679	404151234567890	354123456789012	404151234567891	354123456789013	Delhi-Cell-2001	Mumbai-Cell-2012	0	3G	outgoing	BA10006	false
DE-20240603-11L	failed	0	false	blank	2024-06-03T20:10:00Z	2024-06-03T20:10:00Z	0	+4915223456789	+4917623456790	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
US-20240604-12M	normal	2.95	false	USD	2024-06-04T11:25:00Z	2024-06-04T11:30:00Z	300	+12025550105	+12025550106	310150567890123	352003456789012	310150678901234	355002345678901	NYC-Cell-5022	LA-Cell-7055	0	2G	outgoing	BA10007	false
FR-20240605-13N	busy	0	false	blank	2024-06-05T09:22:10Z	2024-06-05T09:22:10Z	0	+33612345679	+33698765433	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
GB-20240605-14P	normal	4.21	false	GBP	2024-06-05T13:50:00Z	2024-06-05T13:59:00Z	540	+447865432103	+447912345681	234150876543210	356789987654321	234150123456788	354321987654310	London-Cell-1122	London-Cell-1129	0	3G	outgoing	BA10008	false
IN-20240604-15Q	unknown	0	false	blank	2024-06-04T07:17:30Z	2024-06-04T07:17:35Z	5	+919876543212	+919812345680	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
DE-20240605-16R	normal	4.82	false	EUR	2024-06-05T15:20:00Z	2024-06-05T15:30:00Z	600	+4915123456790	+4917623456791	262012345678901	358123456789013	262015678901235	359876543210988	Hamburg-Cell-2151	Berlin-Cell-2110	0	3G	outgoing	BA10009	false
CA-20240605-17S	busy	0	false	blank	2024-06-05T19:30:00Z	2024-06-05T19:30:03Z	3	+14165550107	+14165550108	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false
GB-20240605-18T	normal	5.1	false	GBP	2024-06-05T17:15:00Z	2024-06-05T17:27:00Z	720	+447865432104	+447912345682	234150876543211	356789987654322	234150123456787	354321987654311	Liverpool-Cell-1212	Manchester-Cell-3033	0	3G	incoming	BA10010	false
US-20240605-19U	normal	68.22	true	USD	2024-06-05T22:03:00Z	2024-06-05T22:33:00Z	1800	+12025550107	+12025550108	310150789012345	352004567890123	310150890123456	355003456789012	NYC-Cell-5033	LA-Cell-7066	70.99	3G	outgoing	BA10011	false
IN-20240605-20V	dropped	0.02	false	blank	2024-06-05T03:16:00Z	2024-06-05T03:16:18Z	18	+919876543213	+919812345681	blank	blank	blank	blank	blank	blank	0	2G	outgoing	blank	false

What the 501 rows show

from the 501-row sample

Normal (call termination cause) stands out: 95 of its 302 rows have is_roaming = true, against 0 of 199 for the rest.

19%is_roaming = true
2.2median toll_charge
2call directions
3network types
180median call_duration_seconds
0.0median roaming_charge

Is roaming rate by call_termination_causeis_roaming = true

toll_charge501 rows, in bands of 20

Median 2.2, from 0.0 to 155.8.

currency303 rows with a value · 198 left blank

EUR100
USD53
GBP46
INR21
CAD19
JPY13
SGD7
SEK7
NOK7
AUD6

21 columns by typefrom the column list below

string 14
integer 1
float 2
datetime 2
boolean 2

Columns

21 columns in four groups

blueprint · 21 columns
column	type	description	example
Text 14 columns
`cdr_id`	string	Unique identifier for the call detail recordunique	GB-20240605-01A
`calling_number`	string	Phone number of the caller (MSISDN)	+447865432101
`called_number`	string	Phone number of the called party (MSISDN)	+447912345678
`calling_imsi`	string	IMSI of the calling subscriberoptional	234150987654321
`calling_imei`	string	IMEI of the calling deviceoptional	356789123456789
`called_imsi`	string	IMSI of the called subscriberoptional	234150123456789
`called_imei`	string	IMEI of the called deviceoptional	354321987654321
`calling_cell_id`	string	Cell tower ID where the call originatedoptional	London-Cell-1001
`called_cell_id`	string	Cell tower ID where the call was receivedoptional	London-Cell-1023
`call_termination_cause`	string	Reason for call termination (e.g., normal, dropped, busy, failed)normal · dropped · busy · failed · unknown	normal
`currency`	string	Currency code for charges (ISO 4217)optional	GBP
`network_type`	string	Type of network used for the call (2G, 3G)2G · 3G	3G
`call_direction`	string	Direction of the call (incoming, outgoing)incoming · outgoing	outgoing
`billing_account_id`	string	Identifier for the billing account associated with the calloptional	BA10001
Numbers 3 columns
`call_duration_seconds`	integer	Duration of the call in seconds0 or more	265
`toll_charge`	float	Toll charge for the call in local currency0 or more · optional	3.12
`roaming_charge`	float	Roaming charge for the call in local currency0 or more · optional	0
Dates and times 2 columns
`call_start_time`	datetime	Timestamp when the call started	2024-06-05T08:13:00Z
`call_end_time`	datetime	Timestamp when the call ended	2024-06-05T08:17:25Z
True or false 2 columns
`is_roaming`	boolean	Indicates if the call was made while roaming	false
`fraud_flag`	boolean	Indicates if the call is flagged for potential fraudoptional	false

Use it for

A telecommunications dashboard
The is_roaming rate, toll_charge by call_termination_cause and a breakdown of currency. Excel, Power BI or Tableau.
Why do 95 of 501 rows have is_roaming = true?
A root-cause class exercise
Hand out the rows and one question. The answer is in the data, not in the brief.
Cdrs501
GB-20240605-01A3.12normal
US-20240605-02B45.57normal
GB-20240605-06F150.6normal
A software demo
Believable cdrs with call_start_time, call_end_time and call_duration_seconds to fill a screen in front of a buyer.

This dataset501 rows21 columns

Yours10,000 rows21 columns

blueprint · voice-call-detail-records-cdr-circuit-switched

Behind this dataset

Same schema. As many rows as you need.

These 501 rows came out of a blueprint — 21 columns with generation rules behind each one. Open it in Data Factory to retune a column, add your own, wire in foreign keys, and run it at the size you actually need.

Rules it was built with

CDR ID unique identifier per call record
Calling party (A-number) and called party (B-number) with country code
Call start timestamp and duration in seconds
Call type: MO (mobile originated), MT (mobile terminated), forwarded, roaming
Serving cell ID (CGI) and location area code (LAC)
IMSI (International Mobile Subscriber Identity) and IMEI (device identifier)
Termination cause: normal clearing, busy, no answer, network failure
Charge amount based on duration, time-of-day, roaming status

Rows1,000 rows10,000 rows100,000 rows1,000,000 rows

Open the blueprint in Data Factory

1 credit per row. New accounts start with 25 free credits.

Exports: CSV, JSON, JSONL, Parquet, SQL, Excel, TSV, XML
Licence: yours to use, including commercially
API slug: voice-call-detail-records-cdr-circuit-switched

What should your data show?

No signup. No card.

Sample rows

What the 501 rows show

Columns

Use it for

A telecommunications dashboard

A root-cause class exercise

A software demo

Make it yours.

Same schema. As many rows as you need.

More in Telecommunications

What should your data show?