4S77SL. Radio Amateurs from Sri Lanka will be active using special call sign 4S77SL from Sri Lanka, 2 - 9 February 2026, commemorating Sri Lanka 77th Independence Day.
Information from their QRZ page:
4S77SL is a Special Commemorative Amateur Radio Callsign operated by the Radio Society of Sri Lanka (RSSL) to celebrate Sri Lanka’s 77th Independence Day (4 February 2026).
This special event operation aims to share Sri Lanka’s independence celebrations with the global amateur radio community through friendly on-air activity and international goodwill.
On the occasion of Sri Lanka’s 77th Independence Day, the Radio Society of Sri Lanka extends its warm greetings to radio amateurs and DXers around the world.
We thank you for contacting 4S77SL and for sharing this historic national celebration with us over the air. Your signals, reports, and goodwill are a reminder of the unique power of amateur radio to connect people beyond borders.
DXers and radio amateurs are warmly invited to visit Sri Lanka, an island rich in history, culture, natural beauty, and amateur radio activity. Whether you come for DXpeditions, technical collaboration, or simply to enjoy our heritage and hospitality, you will always be welcome.
We look forward to meeting you on the air; and one day, in person.
Event Details
•Event: Sri Lanka 77th Independence Day
•Special Callsign: 4S77SL
•Bands : All bands All Modes
•Beacon : CW Beacon on 144.470 MHz
•Operation Period: 02 February 2026 to 09 February 2026
•Organized by: Radio Society of Sri Lanka (RSSL)
QSL Information
Electronic Special QSL (eQSL-style) will be issued for:
1.All stations that log QSOs with 4S77SL, and
2.SWL reports for the CW Beacon, submitted to: <info@rssl.lk>
Please include (but not limited to);
•Your callsign / name
•Date & time (UTC)
•Band / frequency
•Mode
•Signal report (if applicable)
•QTH
•For SWL: detailed reception report and receiver/antenna info (recommended) along with a recording
QSL Routes
•QSL via RSSL Bureau
•Direct / Bureau Address:
Radio Society of Sri Lanka (RSSL)
P.O. Box 907, Colombo, WP, Sri Lanka
•SWL Reports : info@rssl.lk
Participation Note (RSSL Members)
Members of the Radio Society of Sri Lanka are encouraged to actively use 4S77SL on air during the operating period to maximize global participation and commemorate this national milestone.
Thank You
Thank you for contacting 4S77SL and for celebrating Sri Lanka’s 77th Independence Day with us on the air.
73!
Radio Society of Sri Lanka (RSSL)
Information from their QRZ page:
4S77SL is a Special Commemorative Amateur Radio Callsign operated by the Radio Society of Sri Lanka (RSSL) to celebrate Sri Lanka’s 77th Independence Day (4 February 2026).
This special event operation aims to share Sri Lanka’s independence celebrations with the global amateur radio community through friendly on-air activity and international goodwill.
On the occasion of Sri Lanka’s 77th Independence Day, the Radio Society of Sri Lanka extends its warm greetings to radio amateurs and DXers around the world.
We thank you for contacting 4S77SL and for sharing this historic national celebration with us over the air. Your signals, reports, and goodwill are a reminder of the unique power of amateur radio to connect people beyond borders.
DXers and radio amateurs are warmly invited to visit Sri Lanka, an island rich in history, culture, natural beauty, and amateur radio activity. Whether you come for DXpeditions, technical collaboration, or simply to enjoy our heritage and hospitality, you will always be welcome.
We look forward to meeting you on the air; and one day, in person.
Event Details
•Event: Sri Lanka 77th Independence Day
•Special Callsign: 4S77SL
•Bands : All bands All Modes
•Beacon : CW Beacon on 144.470 MHz
•Operation Period: 02 February 2026 to 09 February 2026
•Organized by: Radio Society of Sri Lanka (RSSL)
QSL Information
Electronic Special QSL (eQSL-style) will be issued for:
1.All stations that log QSOs with 4S77SL, and
2.SWL reports for the CW Beacon, submitted to: <info@rssl.lk>
Please include (but not limited to);
•Your callsign / name
•Date & time (UTC)
•Band / frequency
•Mode
•Signal report (if applicable)
•QTH
•For SWL: detailed reception report and receiver/antenna info (recommended) along with a recording
QSL Routes
•QSL via RSSL Bureau
•Direct / Bureau Address:
Radio Society of Sri Lanka (RSSL)
P.O. Box 907, Colombo, WP, Sri Lanka
•SWL Reports : info@rssl.lk
Participation Note (RSSL Members)
Members of the Radio Society of Sri Lanka are encouraged to actively use 4S77SL on air during the operating period to maximize global participation and commemorate this national milestone.
Thank You
Thank you for contacting 4S77SL and for celebrating Sri Lanka’s 77th Independence Day with us on the air.
73!
Radio Society of Sri Lanka (RSSL)