OSN

Host

217.41.20.51

Tags: Self-signed certificate

As of our latest check on 2026-06-08, 217.41.20.51 (British Telecommunications Limited, AS2856, United Kingdom) had 1 open port (443) and no known CVEs.

Known CVEs on this host

1open port
0names pointing here
0known CVEs
0known exploited

Open ports and CVEs as of our latest check of this host, 2026-06-08.

No known CVEs on this host.

Network
British Telecommunications Limited AS2856
Open ports
443 · at our latest check, 2026-06-08
Location
United Kingdom GB
Hostname
host217-41-20-51.in-addr.btopenworld.com · reverse DNS, checked 2026-10-05
Route
217.32.0.0/12 · announced by British Telecommunications Limited AS2856 RPKI valid
Organisation
BTnet (BT's UK IP Network - AS2856) · Network service provider (transit)
Registry network
BT-ADSL · 217.41.0.0 - 217.41.63.255 · RIPE
Abuse contact
[email protected] · for BT-ADSL
First seen
2026-06-08 06:06 UTC
Last seen alive
2026-06-08 06:07 UTC
Hosted domains
No host name points here

Reputation

Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.

Services (1)

443/tcp TLS first 2026-06-08 · last 2026-06-08
TLS
TLSv1.2
Certificate for
Vigor Router
Issued by
Vigor Router
Valid
2018-04-23 → 2048-04-22
Note
self-signed certificate
Raw response 
JF�]�|=!<"6f��_�*V�!�_J�N�� 
X���c��_�LC��瀻h�b)A���`۷�5{xu0�q0�Y�	�U^�7^fM0
	*�H��
0x10	UTW10UHsinChu10UHuKou10U

DrayTek Corp.10UDrayTek Support10UVigor Router0
180423133022Z
480422133022Z0x10	UTW10UHsinChu10UHuKou10U

DrayTek Corp.10UDrayTek Support10UVigor Router0�"0
	*�H��
�0�
���;���j3�D���t�6.�a�я�"E�Z�`u"5��i��p$�|�آ�_�o���^�Tw�M�����S����b�Kb�(�����J��Gzc_����u�/P��%7����p�U�I�')h�/�̈́@��ob!{���;�i�N�S{���K�'��O�qt߱y��q^V�Z��[%u�e�=��C������#q�N�6�)H.�NrB����	,l�U����\�Ĭ$�ru����-�^��3b/��9\:c0
	*�H��
�`��$ y�rC�-�g��n�R�֌���1{����'��>iK������Q�%f�橘��?IuGQ#9nj=h9��d��[�Q($a�u'��2����|}a���n��...<truncated>

Port history

Every port that has answered a connection on this address, and when. A port is listed as open above only when a service was identified on it. Times are UTC.

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