Individual contributors to C21HA
| Call sign | First name | Last name | Country | Date |
| OZ1CTK | Boye | Christensen | Denmark | 2011-06-25 16:11:40 |
| AA7JV | George | Wallner | USA | 2011-06-26 17:43:10 |
| HA7RY | Tamás | Pekarik | Hungary | 2011-06-26 18:08:42 |
| KH6CG | Stan | Schwartz | USA | 2011-07-24 17:02:58 |
| V51B | Andre | Pretorius | Namibia | 2011-07-24 18:07:33 |
| ZS1A | Johan | Sevenster | South Africa | 2011-07-31 18:18:41 |
| PE5T | Cornelis | Nijdam | Netherlands | 2011-08-12 22:32:47 |
| RA9CMO | Igor | Khrennikov | Russian Federation | 2011-08-16 11:00:26 |
| K5OA | RUSS | GUIDRY | USA | 2011-08-16 17:21:27 |
| KB8VAO | Steve | Gocala | USA | 2011-08-22 02:08:20 |
| OE6IMD | Michael | Micu-Budisteanu | Austria | 2011-08-24 13:20:00 |
| ON4IZ | Henry "Doc" | Van Kets | Belgium | 2011-08-24 14:22:48 |
| N8DE | Don | Havlicek | USA | 2011-08-24 19:09:17 |
| AD5W | RUSS | COPPING | USA | 2011-08-24 19:27:44 |
| HA0HW | László "Laci" | Szabó | Hungary | 2011-08-25 00:00:00 |
| KH6P | Dan | Greeson | USA | 2011-08-27 00:14:38 |
| K9APW | Dick | Lust | USA | 2011-08-31 23:58:07 |
| GM3YTS | Robert | Ferguson | United Kingdom | 2011-09-12 11:36:36 |
| W4OV | Bruce | Phegley | USA | 2011-09-18 00:00:00 |
| CT1DOF | Jorge | Azevedo | Portugal | 2011-11-28 15:33:15 |
| DL5WG | Roy | Stage | Germany | 2011-12-01 16:24:15 |
| F5VHJ | Albert | Crespo | France | 2011-12-13 15:19:46 |
| KA1R | Matt | Power | USA | 2011-12-18 19:34:48 |
| ANONYMOUS | Hungary | 2011-12-19 10:07:33 | ||
| HA5CRX | Janos | Schmidt | Hungary | 2012-01-04 00:00:00 |
| HA7UW | Sandor "Alex" | Gyorfi | Hungary | 2012-01-04 00:00:00 |
| HA6VH | GÉZA | VARGA | Hungary | 2012-01-05 18:39:14 |
| HA7VK | Csige | Sanyi | Hungary | 2012-01-06 06:58:33 |
| RJ3AA | Sergey | Kislov | Russian Federation | 2012-01-06 14:30:10 |
| WE7K | Tommy | Berggren | USA | 2012-01-10 15:28:18 |
| HA2EQD | Veres | Gyuri | Hungary | 2012-01-10 18:11:20 |
| HA9PP | István "PISTIQ" | Szécsi | Hungary | 2012-01-11 10:59:40 |
| RX3AGD | Dima | Abrosimov | Russian Federation | 2012-01-12 07:44:14 |
| JK1LUY | Motoshi | Hoshino | Japan | 2012-01-12 11:57:45 |
| HB9IQB | Peri | Monioudis | Switzerland | 2012-01-13 09:50:21 |
| KG9Z | Scotty | Meyer | USA | 2012-01-14 14:03:17 |
| N0GBR | John | Moore | USA | 2012-01-15 21:26:12 |
| W6OPO | Bob | Lanning | USA | 2012-01-16 01:17:51 |
| WA2EQF | Scott | Leyshon | USA | 2012-01-18 23:00:50 |
| AI0O | Robert | Helmka | USA | 2012-01-19 14:05:02 |
| ANONYMOUS | USA | 2012-01-20 02:35:13 | ||
| G0JHC | Neil | Carr | United Kingdom | 2012-01-20 13:28:33 |
| W7JY | Pete | Lillie | USA | 2012-01-21 06:17:37 |
| ANONYMOUS | Japan | 2012-01-21 18:12:46 | ||
| IK8CNT | Nino | Mazzuca | Italy | 2012-01-22 12:07:22 |
| VE2NGH | George | Hedrei | Canada | 2012-01-23 00:38:27 |
| ANONYMOUS | Russian Federation | 2012-01-23 10:25:37 | ||
| HA5PT | Tamás | Holman | Hungary | 2012-01-24 21:12:04 |
| KH6DC | Delwyn | Ching | USA | 2012-01-24 21:25:40 |
| N4DWK | David | Kiefer | USA | 2012-01-25 05:11:09 |
| VK3HJ | Luke | STEELE | Australia | 2012-01-25 11:51:24 |
| K1CP | Clif | Power | USA | 2012-01-25 14:40:19 |
| KK5OQ | Charles | Anderson | USA | 2012-01-26 02:47:10 |
| N4VAN | Walter | Latture | USA | 2012-01-27 00:17:21 |
| MW0JZE | Anthony | David | United Kingdom | 2012-01-28 08:48:14 |
| JO1PYV | Hakozaki | Akira | Japan | 2012-01-28 08:53:40 |
| 9A2TD | Vlatko | Lovric | Croatia | 2012-01-29 13:40:37 |
| WS3N | Jack | Bono | USA | 2012-01-29 19:51:17 |
| W6BK | David | Elliott | USA | 2012-01-30 06:17:56 |
| W7JW | Jeff | Wheeler | USA | 2012-02-01 01:29:02 |
| K7PJT | Tom | Rousseau | USA | 2012-02-01 16:11:07 |
| JA1PFP | Takashi | Yoshida | Japan | 2012-02-02 03:42:21 |
| NV5E | Robert | May | USA | 2012-02-02 05:14:20 |
| K6XT | Art | Charette | USA | 2012-02-02 16:08:13 |
| KT0NY | Tony | Estep | USA | 2012-02-02 17:34:50 |
| N6PSE | Paul | Ewing | USA | 2012-02-02 23:25:40 |
| OH2BU | Jari | Jussila | Finland | 2012-02-03 08:54:54 |
| W9BF | Bob | Farmer | USA | 2012-02-03 17:40:19 |
| HG7AN | Zoltan | Hajdu | Hungary | 2012-02-04 09:10:45 |
| W2QO | Jamie | Punderson | USA | 2012-02-04 23:07:15 |
| KG7E | James | Kornacki | USA | 2012-02-05 03:41:08 |
| K5JZ | George G | Bethea | USA | 2012-02-06 02:11:37 |
| W8VVG | Larry | Pasman | USA | 2012-02-06 13:37:46 |
| JE1HRC | Hiroki | Takeda | Japan | 2012-02-06 17:37:16 |
| ANONYMOUS | USA | 2012-02-06 22:14:03 | ||
| K8YAH | Ronald | Vanke | USA | 2012-02-06 22:20:26 |
| N9UM | M | Thomas | USA | 2012-02-06 22:55:22 |
| N2WK | Wayne | King | USA | 2012-02-07 01:30:59 |
| W7AV | Dennis Rick | Perry | USA | 2012-02-07 02:08:55 |
| AA6K | Shirley | Rose | USA | 2012-02-07 03:33:40 |
| ZL4AS | Cliff | Gray | New Zealand | 2012-02-07 04:52:48 |
| ANONYMOUS | USA | 2012-02-07 17:25:29 | ||
| W5PJR | Dean | Showalter | USA | 2012-02-07 18:12:35 |
| K4HMB | Joe | Wheeler | USA | 2012-02-09 02:24:23 |
| JH1RGG | Masayoshi | Utsugi | Japan | 2012-02-09 13:31:23 |
| DL1XX | Klaus | Wagner | Germany | 2012-02-11 19:43:50 |
| W8LGJ | Patrick | Welch | USA | 2012-02-11 20:56:36 |
| W5XX | Malcolm | Keown | USA | 2012-02-12 00:26:28 |
| K6FW | Frank | Westphal | USA | 2012-02-12 05:34:37 |
| K1LD | David | Gerns | USA | 2012-02-14 11:48:53 |
| HA2SN | Zsolt | Gyimesi | Hungary | 2012-06-08 20:51:40 |
