Arrival & Digital Check-in

Check in conveniently online, arrive whenever you like - no reception required.

The Most Important Things at a Glance

• Apartment available from 4:00 PM

Online check-in only possible on the first day of your stay, until 9:00 PM

• Late arrival possible anytime on arrival day - even at night

Have your ID card or passport ready

• No app needed, everything in the browser
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Explained in 180 Seconds

How Your Check-in Works

Fill Out Registration Form

Before your arrival, you'll receive an email with your personal link. The link opens directly in your browser, no app download required. Have your ID card or passport ready and fill out the registration form - it takes less than two minutes.

Business trip? Enter your company address here. Otherwise, the invoice will be issued to your private address and can only be changed at check-out.
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Receive Door Codes

Only possible on your first day of your booking, by 9:00 PM at the latest. After that, your arrival time is flexible - even at night.

Receive Door Codes

After check-in, you'll receive a welcome email with all the instructions and your personal door codes.
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Access to the digital guest guide

21rooms

Hello Max Mustermann,

welcome to our hotel.

We hope you had a pleasant journey.

With this e-mail you will receive your personal access to our digital guest service system. The codes for access to our house are valid from 4 p.m. The start code is required for this apartment door, after that the comfort code always works. Access with the Comfort Code is always possible at the front door. With our digital guest service system, you can call up useful information about your stay on any device. You can also book various services if you wish. The online check-in and access to the house explained as a video. https://youtu.be/ziZcpGK_mic

Just have a look.

We wish you a pleasant stay.Your apartment number is:room xx

Your start code: xx xxx xxx xxx ✓          Your Comfort Code: xxxx ✓

[ View now ]

Reservation number: KBAXLBEX-1

Max Mustermann

Open Apartment

On your first entry:
Enter your Start code - each digit is confirmed with a key tone. The lock activates and switches to comfort mode.

For the rest of your stay:
Enter your Comfort code, also confirmed with a key tone per digit. The door opens.
Start Check - in
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If something doesn't work

Didn't receive a check-in email?

No problem - there are two ways to start it yourself:

Via the website: Click "Start check-in" at the top and enter your last name and your reservation number (from your booking confirmation).

On-site via QR code: You'll find a QR code in the building's entrance area. Scan it with your smartphone camera, enter your last name and reservation number - done.

Last name not recognized?

• First and last name swapped: Try it with just your first name.

• Umlauts & special characters: Enter the name exactly as it appears on your booking confirmation - whether with Ä, Ö, Ü, ß or written as Ae, Oe, Ue, ss.

• Double names: Try once with a hyphen, once without, or just the first part of the name.

• Did someone else make the booking? If booked by an employer, colleague, or partner, the reservation is often listed under their name or the company name. Ask them for the exact details.

Reservierung wird nicht erkannt?

• Buchung über Booking.com, Expedia oder Reisebüros.: Die Portalnummer bzw. Reservierungsnummern von Reisebüros weicht von unserer internen Nummer ab. Suchen Sie auf der Bestätigung nach der „Vorgangsnummer des Hotels" oder prüfen Sie das Nachrichten-Postfach im Portal.

• Leerzeichen: Beim Kopieren schleicht sich oft ein unsichtbares Leerzeichen vor oder hinter die Nummer ein. Entfernen Sie es.

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Direct Contact

Still not working? Give us a quick call during check-in hours. We'll check your details directly in the system and resend your check-in email if needed.
+49 841 93897250
info@21rooms.de

Mission Statement

21rooms is for business trips and city breaks, for guests who value quality and attention to detail - without unnecessary frills. Where a stay still feels like living, whether it's days or weeks.
Book direct and get our best rate.

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