What grid square is Rotterdam?

JO11 is the live DXRadar reference square for Rotterdam. The exact portable or home QTH may vary within the square, but this page tracks the center of JO11 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 JO11 right now?

JO11 is currently rated FAIR. The best bands right now are 10m, 20m, 30m, 40m, 60m, with 10m as the main band to watch first.

HomeSFI --K ---:-- UTC

Grid JO11 Band Conditions — Rotterdam

Localized HF conditions for Maidenhead locator JO11. Coordinating at 51.50°, 3.00°. Updated with real-time telemetry from NOAA and DX cluster reports.

JO11 conditions are FAIR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 137.

Regional Radar

SFI

137

K-Index

3 Kp

Center Coords

51.5, 3.0

Local Phase

Daylight

Grayline window

Sunrise 03:56 UTC

Sunset 19:54 UTC from JO11

From Rotterdam, work the 03:56 UTC and 19:54 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses JO11.

Best band now

10m

10m and 15m typically deliver the most consistent Europe outbound DX while solar flux remains healthy.

Closest operating hub

Rotterdam

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

Latitude zone: upper mid-latitude
Local phase: Daylight
Aurora exposure: low at this latitude
Grayline: 03:56 UTC / 19:54 UTC
Best high band: 10m
Nearest city: Rotterdam

● Local Band Quality Scorings

Use this local score for JO11, 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 JO11 — Rotterdam

Great-circle distance, short-path beam heading, the bands most likely open right now from JO11 to each DX region at SFI 137 / Kp 3, 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	4,404 mi	87°	10m, 15m, 20m	Open now
North America	4,588 mi	304°	10m, 15m, 20m	Open now
Southern Africa	5,534 mi	159°	10m, 15m, 20m	Open now
East Asia / Japan	5,806 mi	35°	10m, 15m, 20m	Open now
South America	5,866 mi	238°	10m, 15m, 20m	Open now
Oceania	10,192 mi	61°	40m, 20m, 80m	Open now

● Band-by-Time Plan for JO11

A planning heuristic for the local day at JO11, built from sunrise 03:56 UTC, sunset 19:54 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.

Dawn grayline

around 03:56 UTC

40m · 30m · 20m

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

Morning

after 03:56 UTC

20m · 15m · 10m

High bands rising with the sun; check 10m for DX.

Midday

local noon

10m · 15m · 20m

Peak high-band window — 10m and 15m open widest.

Dusk grayline

around 19:54 UTC

20m · 40m

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

Night

after 19:54 UTC

40m · 80m

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

Recent local activity

Spots touching JO11 and the adjacent squares

These are the newest 10m, 15m, and 20m reports where one side of the path sits in JO11, JO12, JO10, JO21, JO01. This gives the page unique, local context instead of a generic solar snapshot.

No fresh PSKReporter paths are cached for the immediate JO11 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 JO11, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.

Open contest calendar

Nearby grids