Online Status

Server IP address resolved: No
Http response code: None
Last Checked: 12/01/2023 traffic volume is 1,831 unique daily visitors and their 2,929 pageviews. The web value rate of is 56,239 USD. Each visitor makes around 1.71 page views on average.

By Alexa's traffic estimates placed at 998 position over the world, while the largest amount of its visitors comes from India, where it takes 69,913 place. is hosted by Stichting Centrum voor Wiskunde en Informatica in Netherlands; however, we recommend migrating the server to India, as it will speed up page load time for the majority of users. See the list of other web pages hosted by Stichting Centrum voor Wiskunde en Informatica. registered under .NL top-level domain. Check other websites in .NL zone.

The last verification results, performed on (December 01, 2023) show that has an invalid SSL certificate. Click “Refresh” button for SSL Information at the Safety Information section.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust is pretty a safe domain.

Relying Google MobileFriendly test is well optimized for mobile and tablet devices, however web page loading speed may be improved.

Global Rank
Average Load Time
Links In Count
Website Value

Last Updated: 12/01/2023
Overall result - is safe.
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton Connect Safe
Last Updated: 03/19/2023 is safe.
Norton ConnectSafe evaluates for any unsafe and insecure content. The results are critical for families with young children.
Google Safe Search
Last Updated: 11/10/2016 is safe.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Google Safe Browsing
Last Updated: 01/09/2019 is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
Site Advisor
Last Updated: 02/25/2021 is safe.
McAfee assesses for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze for mature or inappropriate content, only security checks are evaluated.
Web of Trust
Last Updated: 01/10/2019 child safety is very good.
The WOT calculates reputation of the This reputation system receives ratings from users and information from third-party sources, assesses the for safety features and confirms, whether is suitable for children.

SSL Information
WARNING!Certificate download error. Previous scan results are shown below.
Issuer OrganizationUnknown
Valid formUnknown
SignedNo information
Additional Domains
Server Location

ASN Information

ASN ID: 1888
ASN Title: Stichting Centrum voor Wiskunde en Informatica

Last Update: 04/19/2023

% This is the RIPE Database query service.
% The objects are in RPSL format.
% The RIPE Database is subject to Terms and Conditions.
% See

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

% Information related to 'AS1877 - AS1903'

as-block: AS1877 - AS1903
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
created: 2015-09-30T14:19:22Z
last-modified: 2015-09-30T14:19:22Z
source: RIPE

% Information related to 'AS1888'

% Abuse contact for 'AS1888' is ''

aut-num: AS1888
as-name: CWI-NL
remarks: Amsterdam
remarks: The Netherlands
import: from AS1103
action pref=90;
accept AS1103
import: from AS1104
action pref=80;
accept AS1104
import: from AS1124
action pref=70;
accept AS1124
import: from AS1126
action pref=60;
accept AS1126
export: to AS1103
announce AS1888
export: to AS1104
announce AS1888
export: to AS1124
announce AS1888
export: to AS1126
announce AS1888
default: to AS1103
action pref=90;
networks ANY
admin-c: CWI1024-RIPE
tech-c: CWI1024-RIPE
status: ASSIGNED
mnt-by: AS1888-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2017-11-15T09:14:24Z
source: RIPE # Filtered
sponsoring-org: ORG-Sb3-RIPE

organisation: ORG-CCvW1-RIPE
org-name: Stichting Centrum voor Wiskunde en Informatica
org-type: OTHER
address: Kruislaan 413
address: NL-1098 SJ Amsterdam
address: NL
abuse-c: AR22878-RIPE
mnt-ref: RIPE-ERX-MNT
mnt-by: RIPE-ERX-MNT
created: 2004-11-03T15:42:47Z
last-modified: 2014-11-17T16:27:20Z
source: RIPE # Filtered

role: CWI ITF
address: Centrum Wiskunde & Informatica Science Park 123 NL-1098 XG Amsterdam The Netherlands
phone: +31 (0)20 592 9333
fax-no: +31 (0)20 592 4199
remarks: Please contact "" for complaints and/or abuse
admin-c: HR1024-RIPE
tech-c: HR1024-RIPE
mnt-by: AS1888-MNT
nic-hdl: CWI1024-RIPE
created: 2004-10-06T10:16:49Z
last-modified: 2017-05-08T10:01:06Z
source: RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.91.2 (BLAARKOP)


Domain name:
Status: active

Moreelsepark 48
3511EP Utrecht

Abuse Contact:

Creation Date: 1986-04-30

Updated Date: 2021-02-23


Domain nameservers:

Record maintained by: NL Domain Registry

Copyright notice
No part of this publication may be reproduced, published, stored in a
retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, recording, or otherwise, without prior
permission of the Foundation for Internet Domain Registration in the
Netherlands (SIDN).
These restrictions apply equally to registrars, except in that
reproductions and publications are permitted insofar as they are
reasonable, necessary and solely in the context of the registration
activities referred to in the General Terms and Conditions for .nl
Any use of this material for advertising, targeting commercial offers or
similar activities is explicitly forbidden and liable to result in legal
action. Anyone who is aware or suspects that such activities are taking
place is asked to inform the Foundation for Internet Domain Registration
in the Netherlands.
(c) The Foundation for Internet Domain Registration in the Netherlands
(SIDN) Dutch Copyright Act, protection of authors' rights (Section 10,
subsection 1, clause 1).

DNS Records
HostA RecordTTL
HostMX RecordPriorityTTL
HostNS RecordTTL
HostTXT RecordTTL
cwi.nlScience Park 123, 1098 XG Amsterdam, Netherlands86400
cwi.nlv=spf1 ip4: -all86400
cwi.nlCentrum Wiskunde & Informatica86400
TTL: 86400
Email address:
Serial: 2023050301
Refresh: 28800
Retry: 7200
Expire: 604800
Minimum: 43200



Last tested: 06/21/2019

Desktop Speed

Desktop Resource Breakdown
Total Resources104
Number of Hosts3
Static Resources90
JavaScript Resources56
CSS Resources4

Last tested: 04/25/2017

Mobile Usability
Mobile Speed

Mobile Resource Breakdown
Total Resources99
Number of Hosts3
Static Resources87
JavaScript Resources56
CSS Resources4