Orbital plane	Operational Satellites	Spares
1	145, 143, 140, 148, 150, 153, 144, 149, 146, 142, 157	124
2	134, 141, 137, 116, 135, 151, 120, 113, 138, 130, 131	115
3	117, 168, 180, 123, 126, 167, 171, 121, 118, 172, 173	175, 176, 170
4	119, 122, 128, 107, 132, 129, 100, 133, 125, 136, 139	169
5	158, 160, 159, 163, 165, 166, 154, 164, 108, 155, 156	105
6	102, 112, 104, 114, 103, 109, 106, 152, 147, 110, 111	162, 161
Total 6	Total 66	Total 9

Original Iridium satellites (with codename < 100) are being removed from service. New Iridium NEXT satellites (with codename >= 100) are being put into service.
Source: http://www.rod.sladen.org.uk/iridium.htm
Last update: 2020-03-11

Date	Site	Vehicle	Satellites
1997-05-05	Vandenberg	Delta II 7920-10C	4, 5, 6, 7, 8
1997-06-18	Baikonur	Proton-K/17S40	9, 10, 911, 12, 13, 914, 16
1997-07-09	Vandenberg	Delta II 7920-10C	15, 17, 18, 920, 921
1997-08-21	Vandenberg	Delta II 7920-10C	22, 23, 24, 25, 26
1997-09-01	Taiyuan	Chang Zheng 2C-III/SD	0
1997-09-14	Baikonur	Proton-K/17S40	27, 28, 29, 30, 31, 32, 33
1997-09-27	Vandenberg	Delta II 7920-10C	19, 34, 35, 36, 37
1997-11-09	Vandenberg	Delta II 7920-10C	38, 39, 40, 41, 43
1997-12-08	Taiyuan	Chang Zheng 2C-III/SD	42, 44
1997-12-20	Vandenberg	Delta II 7920-10C	45, 46, 47, 48, 49
1998-02-18	Vandenberg	Delta II 7920-10C	50, 52, 53, 54, 56
1998-03-25	Taiyuan	Chang Zheng 2C-III/SD	51, 61
1998-03-30	Vandenberg	Delta II 7920-10C	55, 57, 58, 59, 60
1998-04-07	Baikonur	Proton-K/17S40	62, 63, 64, 65, 66, 67, 68
1998-05-02	Taiyuan	Chang Zheng 2C-III/SD	69, 71
1998-05-17	Vandenberg	Delta II 7920-10C	70, 72, 73, 74, 75
1998-08-19	Taiyuan	Chang Zheng 2C-III/SD	3, 76
1998-09-08	Vandenberg	Delta II 7920-10C	77, 79, 80, 81, 82
1998-11-06	Vandenberg	Delta II 7920-10C	2, 83, 84, 85, 86
1998-12-19	Taiyuan	Chang Zheng 2C-III/SD	11, 20
1999-06-11	Taiyuan	Chang Zheng 2C-III/SD	14, 21
2002-02-11	Vandenberg	Delta II 7920-10C	90, 91, 94, 95, 96
2002-06-20	Plesetsk	Rokot/Briz-KM	97, 98
2017-01-14	Vandenberg	Falcon 9 FT	102, 103, 104, 105, 106, 108, 109, 111, 112, 114
2017-06-25	Vandenberg	Falcon 9 FT	113, 115, 117, 118, 120, 121, 123, 124, 126, 128
2017-10-09	Vandenberg	Falcon 9 B4	100, 107, 119, 122, 125, 129, 132, 133, 136, 139
2017-12-23	Vandenberg	Falcon 9 FT	116, 130, 131, 134, 135, 137, 138, 141, 151, 153
2018-03-30	Vandenberg	Falcon 9 B4	140, 142, 143, 144, 145, 146, 148, 149, 150, 157
2018-05-22	Vandenberg	Falcon 9 B4	110, 147, 152, 161, 162
2018-07-25	Vandenberg	Falcon 9 B5	154, 155, 156, 158, 159, 160, 163, 164, 165, 166
2019-01-11	Vandenberg	Falcon 9 B5	167, 168, 169, 170, 171, 172, 173, 175, 176, 180
Total 31 launches			Total 171 satellites

Source: https://en.wikipedia.org/wiki/Iridium_satellite_constellation