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Is MSN dead yet?

(And by MSN I mean microsoft's messenger service, previously known as MSN Messenger or Windows Live Messenger)
(msn.com is unrelated and not going to die, please don't sue me Microsoft, I love you ♥)
(Not affiliated with microsoft in any way)

MOSTLY

Most third party clients can't connect anymore, MSNP18 is gone.

Current situation

The MSNP18 protocol and all the older versions are gone. MSNP21/22/24 are still there.

Most clients still don't implement newer versions. Some are listed on the right column.

Related links

Breaking news

2016-05-14: Major update to the server status section, see below for details

2016-04-27: db3 servers moved to db5.

2016-02-05: bn1 servers moved to bn2.

2015-06-18: Temporary outage of bay servers. A few have been repurposed for skypeweb.

2015-05-27: Nothing broke recently, just reduced the amount of clutter in this page.

2015-03-12: The MSNP18 protocol version, used by most third party clients, and ports 80 and 1863 are gone.

2015-03-05: Most internal bn1 servers closed ports 80 and 1863 (Updated version checker to use https instead)

2015-02-26: Almost all the bay and bn1 servers now reject the MSNP18 protocol, used by most third party clients.

2015-01-09: Two main db3 servers and one bay server closed port 80 (HTTP).

2014-12-17: Two main bn1 servers closed port 80 (HTTP). HTTPS still works, but few clients use it.

2014-12-09: Main servers closed port 1863. HTTPS connections to all these servers still work.

2014-11-13: ApplicationID for windows live messenger 2008 and 2009 blocked. Messengergeek blog post

What clients work

(Missing anything in this list? Pull requests welcome!)

Skypeweb based clients (not MSNP, but close enough) Official clients:

Needlessly detailed server status #

Updated every 60 minutes.

May have a few minor mistakes (due to packet loss, etc). Scroll down for reference.

May 2016 update: The bn1 and db3 datacenters are gone, at least for msn, and were replaced by bn2 and db5. I thought they were broken, like many servers of the list were already - repurposed for unrelated things. So now we have fresh IP lists and everything is green again.

Port 80 and 1863 are no longer tested against. MSNP22 scanning was added (because it's an one line change), and MSNP18 is kept in the table but not actually scanned.

Looks a lot less dead now!

bay

IP :443 MSNP18 MSNP21 MSNP22
64.4.45.62
64.4.45.209
64.4.61.38
64.4.61.42
64.4.61.43
64.4.61.52
64.4.61.87
64.4.61.118
64.4.61.128
64.4.61.133
64.4.61.135
64.4.61.161
64.4.61.178
64.4.61.204
64.4.61.212
64.4.61.215
64.4.61.218
64.4.44.80
64.4.44.81
64.4.44.83
64.4.44.85
64.4.44.86
64.4.44.90
64.4.44.92
64.4.46.16
64.4.46.20
64.4.46.51
64.4.46.79
64.4.46.100
64.4.46.115
64.4.46.143

bn2

IP :443 MSNP18 MSNP21 MSNP22
65.52.108.75
65.55.44.19
65.55.44.20
65.55.44.21
65.55.44.22
65.55.44.23
65.55.44.24
65.55.44.25
65.55.44.26
65.55.44.27
65.55.44.28

db5

IP :443 MSNP18 MSNP21 MSNP22
191.232.139.15
191.232.139.21
191.232.139.22
191.232.139.23
191.232.139.24
191.232.139.25
191.232.139.26
191.232.139.27
191.232.139.28
191.232.139.29
191.232.139.30

Reference #

bay Server region codename (first three characters of the hostname of each of those servers)
Highlight The highlighted rows are the main servers of a region, which redirect to the rest.
:80 (No longer scanned here) HTTP port open. This is what you'd use when enabling HTTP method in old clients.
:443 HTTPS port open. Same as above, but not all clients use this. Newer versions of official clients use it (including WLM 2012, the windows 8 messaging client and skype)
:1863 (No longer scanned here) MSNP port open. The good old standard msn protocol port.
MSNP18 (No longer scanned here) Sends VER 1 MSNP18 to port 443 to test if the server still supports that version (the most common one among third party clients). Also helps check for false positives
MSNP21 Same as above, but sends VER 1 MSNP21 instead, to port 443. This version is not very common among third party clients (Windows Live Messenger 2012 uses it)
MSNP22 Same as above, with VER 1 MSNP22. The windows 8.0 messaging client uses this. No third party implementations I'm aware of.

FAQ #

Why care about MSN? #

A few reasons:

Not affiliated to Microsoft Corporation in any way. Microsoft, MSN, and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries