| Callsign | W4ESF |
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| Radio Service | HV - Vanity |
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| License Status | A - Active |
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| Grant Date | 2020-08-13 |
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| Effective Date | 2020-08-13 |
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| Expire Date | 2030-08-13 |
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| Cancel Date | |
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| Last Action Date | 2020-08-13 |
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| End Date | 2030-08-13 |
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| Available Date | 2032-08-14 |
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| Applicant Type | I - Individual |
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| Entity Name | RATCHATAWETCHAKUL, YONGYUT |
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| Street Address / Locality | 810 Nevada st.
Redlands, CA 92374 |
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| County | San Bernardino County |
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| Zip Location | 34°04'01.7"N 117°10'18.8"W |
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| Maidenhead | DM14jb |
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| FRN | 0018289900 |
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| Licensee ID/SGIN | L01446957 / 000 |
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| Licensee Class | E - Amateur Extra |
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| Callsign Group | C - 1x3 |
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| ULS/Geo Region | 4 / 6 / CA |
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| Prev Callsign / Prev Class | KD8JSA G - General |
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| Next Callsign | |
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| Trustee Callsign / Trustee Name | |
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| Vanity Type | E - By List |
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| ULS File Number | 0005172878 |
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| Phonetic weight / Morse weight | 11 / 50 |
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