OSN

Host

212.56.121.235

Tags: Self-signed certificate

As of our latest check on 2026-06-07, 212.56.121.235 (British Telecommunications Limited, AS6871, 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, 2026-06-07.

No known CVEs on this host.

Network
British Telecommunications Limited AS6871
Open ports
443 · at our latest check, 2026-06-07
Location
United Kingdom GB
Hostname
235.citinet.plus.net.uk · reverse DNS, checked 2026-10-05
Route
212.56.64.0/18 · announced by British Telecommunications Limited AS6871 RPKI valid
Organisation
Plusnet plc · Access network (cable / DSL / ISP)
Registry network
CITI-NET · 212.56.121.0 - 212.56.121.255 · RIPE
Abuse contact
[email protected] · for CITI-NET
First seen
2026-06-07 09:05 UTC
Last seen alive
2026-06-07 09:06 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 2026-06-07 · last 2026-06-07
TLS
TLSv1.2
Certificate for
www.draytek.com
Issued by
Vigor Router
Valid
2026-05-22 → 2027-06-21
Note
self-signed certificate
Raw response 
TPH왡����U�WHYU0��=g?���M��9Ϗ� {gp���K�F��8�T����|�4��ǡ����/����0��0���	�!�T���e0
	*�H��
0x10	UTW10UHsinChu10UHuKou10U

DrayTek Corp.10UDrayTek Support10UVigor Router0
260522180957Z
270621180957Z0x10	UTW10UHsinChu10UHuKou10U

DrayTek Corp.10UDrayTek Support10UVigor Router0�"0
	*�H��
�0�
���Po1nVS94��8���'u'�M
����S�2�:w4�-��.�ެ�0���1X�DSjT�H�s���X�	�_<�2<B�Vw�������A�CA��`�Mx���=�k\���k�,j1p֥���u���]�<x���o�3�}1̉,Uo��!Pt�B*�×�+N�Uq�^\'Q�N�[���,2C]�۬�y�[�xF|�b�1¡`��c��b��0\NU������!Yf�g�f�j��'�����E��؏e���3010U%0
+0U0�www.draytek.com0
	*�H��
�h8����+~�9�e�(>��~p$��
��[���]s~
�	P?��d��ԑ��wbB���� ������4��...<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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