Network

IPv4 address

216.73.216.152

ASN

AS16509

ISP / organisation

AMAZON-02 - Amazon.com, Inc.

BGP prefix

216.73.216.0/22

Registered country

US

Registry

ARIN

Network details come from Team Cymru's public IP-to-ASN service, looked up over DNS by this server, for this request only.

Screen and window

Measured in your browser. None of it is sent to the server.

Viewport (CSS pixels)

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Screen (CSS pixels)

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Available screen area

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Device pixel ratio

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Screen in device pixels

— Screen size multiplied by the pixel ratio — the physical resolution your browser implies.

Orientation

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Canvas

Canvas element size (CSS pixels)

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Canvas backing store

— Its width and height attributes — what the 2D context actually draws into.

Backing store for a sharp canvas

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Largest canvas dimension accepted

— Found by asking for progressively larger canvases until one comes back blank. Browsers differ, and Safari on iOS is the strictest.

Possible device

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What leaves your browser

• This page, requested from this site. Like every web server it sees your address, your user agent and your language preference for as long as it takes to answer — and writes none of it down.
• The J-Tools bar at the top, loaded from id.j-tools.net: a script, a stylesheet, the suite logo and this tool's own name and colour. No cookies, no analytics.
• One DNS lookup to Team Cymru, made by this server rather than by your browser, to name the network your address belongs to.
• Nothing from the screen, canvas or device sections. Those are measured in your browser and stay there — the page never posts them anywhere.
• Nothing else at all: no ads, no trackers, no third-party fonts or scripts, no cookies, no local storage, no request log, no account.

JSON API

The server-side half of this page, for terminals and scripts.

Everything the server knows

curl whatsmyip.j-tools.net/api

/api/ip works too, if that is what your fingers type.

Just the address

curl whatsmyip.j-tools.net/ip

Plain text with a trailing newline, so it drops straight into a shell variable.

Both endpoints send Access-Control-Allow-Origin: *, so a page on any origin can call them.

The screen, canvas and device sections are not in the API: they are measured in your browser and never reach the server, so there is nothing for the API to return.