What grid square is the OL40 operating area?

OL40 is the live DXRadar reference square for the OL40 operating area. The exact portable or home QTH may vary within the square, but this page tracks the center of OL40 for planning propagation.

How do I find my grid square?

Use a Maidenhead grid lookup from your GPS coordinates or street address, then compare that grid with the nearby squares linked on this page. A 4-character grid is enough for most HF planning.

What bands are open in OL40 right now?

OL40 is currently rated POOR. The best bands right now are 10m, 20m, 30m, 40m, 60m, with 10m as the main band to watch first.

Grid OL40 Band Conditions

Localized HF conditions for Maidenhead locator OL40. Coordinating at 20.50°, 109.00°. Updated with real-time telemetry from NOAA and DX cluster reports.

OL40 conditions are POOR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 105.

Regional Radar

SFI

105

K-Index

1.33 Kp

Center Coords

20.5, 109.0

Local Phase

Daylight

Grayline window

Sunrise 22:33 UTC

Sunset 10:42 UTC from OL40

From the OL40 operating area, work the 22:33 UTC and 10:42 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses OL40.

Best band now

10m

10m is the headline band right now, with 20m as the dependable fallback if conditions soften.

Closest operating hub

the OL40 operating area

This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.

Latitude zone: tropical
Local phase: Daylight
Aurora exposure: low at this latitude
Grayline: 22:33 UTC / 10:42 UTC
Best high band: 10m
Nearest city: the OL40 operating area

● Local Band Quality Scorings

Use this local score for OL40, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.

10m

EXCELLENT

15m

EXCELLENT

20m

GOOD

40m

POOR

80m

POOR

● Best DX Windows from OL40 — the OL40 operating area

Great-circle distance, short-path beam heading, the bands most likely open right now from OL40 to each DX region at SFI 105 / Kp 1.33, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.

Target	Distance	Beam	Bands to try	Status
South Asia	1,996 mi	279°	10m, 15m, 20m	Open now
East Asia / Japan	2,052 mi	52°	10m, 15m, 20m	Open now
Oceania	4,428 mi	141°	10m, 15m, 20m	Open now
Europe	5,526 mi	320°	40m, 20m, 80m	Open now
Southern Africa	6,420 mi	243°	10m, 15m, 20m	Open now
North America	7,970 mi	23°	10m, 15m, 20m	Open now
South America	11,501 mi	292°	40m, 20m, 80m	Open now

● Band-by-Time Plan for OL40

A planning heuristic for the local day at OL40, built from sunrise 22:33 UTC, sunset 10:42 UTC, SFI 105, and Kp 1.33. Not a measurement — a starting point for where to listen as the day turns.

Dawn grayline

around 22:33 UTC

40m · 30m · 20m

Grayline enhancement — low bands reach long distances as the terminator passes.

Morning

after 22:33 UTC

20m · 15m

Modest SFI — 20m is the daytime workhorse here.

Midday

local noon

15m · 20m

20m and 15m carry the daytime load at this SFI.

Dusk grayline

around 10:42 UTC

20m · 40m

Second grayline peak — 20m holds, then hands off to 40m.

Night

after 10:42 UTC

40m · 80m

Low bands own the darkness — 40m for DX, 80m regional.

Recent local activity

Spots touching OL40 and the adjacent squares

These are the newest 10m, 15m, and 20m reports where one side of the path sits in OL40, OL41, OK49, OL50, OL30. This gives the page unique, local context instead of a generic solar snapshot.

No fresh PSKReporter paths are cached for the immediate OL40 footprint right now. That usually means you should widen the search to the nearest regional hubs below or fall back to 20m/40m for the next operating window.

Top DX targets

Where this grid is reaching right now

No outbound targets were strong enough to rank from the current cache. Check back after the next PSKReporter refresh or switch to the regional grids below.

Contest preview

Next major contest outlook

No contest event is currently loaded. For planning from OL40, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.

Open contest calendar

Nearby grids