Novice question on infinity -why is my ISP listed as infonet services Corp onBT Infinity?

[camper]

My Public IP appears as Infonet Corp Services when assessing IP address / speed tests online. Typically followed or proceeded by BT Central Plus. Located in London. I am nowhere near . 

As a novice here - would this be expected ? Thanks. 

[gg30340]

A good few years back BT purchased the company Infonet along with their range of IP addresses and it would appear that they are being used by BT.

The London location is where you leave the BT network and join the World Wide Net.

[camper]

@gg30340 Thanks for this. So do these details alter ?, for instance if you didnt use Infinity you used a different BT package? 

Also, why would source IP Differ regularly?  for example sometines I get a 65. 20 xx  adress listed as origintaing source and others  a 212.82.xx variant and then sometimes I get my full public adress :  165.120.15x.xx including the specific machine I'm on listed ?? 

Would love to unravel this mystery!. Thanks. 

[Webby]

No. The IP addresses in the various "pools" will be just be allocated as and when a BT broadband subscriber connects.

[licquorice]

Your public IP address is dynamic and is allocated from a pool of addresses and will change each time your hub resyncs. Your routing may also change as there will be multiple gateways to the internet.

[camper]

@licquorice @Webby  Thanks for responses.

I'm confused , I do understsnad that my public IP would change each time my hub is turned off / on and I'm allocated a new one.

But... what about the question about differing  source IP adresses as highlighted(with respect to sent emails)   - really dont understand this at all - can you explain at all or help really appreciated . 

lAlso, why would source IP Differ regularly?  for example sometines I get a 65. 20 xx  adress listed as origintaing source and others  a 212.82.xx variant and then sometimes I get my full public adress :  165.120.15x.xx including the specific machine I'm on listed ?? 

Would love to unravel this mystery!. Thanks. 

[TimCurtis]

---

@camper wrote:

@licquorice @Webby  Thanks for responses.

I'm confused , I do understsnad that my public IP would change each time my hub is turned off / on and I'm allocated a new one.

---

Do you turn the hub off regularly as this is not a good idea & would very likely reduce you speeds as the system that monitors the stability of your line (DLM) will think the line is unstable & reduce speeds to stabilise the line?

[gg30340]

The hub is designed to be left on 24/7 and if possible that is what you should do but there are often occasions when it needs to be turned off or reset.

You would need to be repeatedly turning the hub off and on in a short space of time for to DLM to reduce line speed. Turning it off once a day or now and again would not cause DLM to take any action.

[licquorice]

The source address of sent emails is the address of the mail server, which is not just one machine but a complete farm of machines that may be in different geographic locations for security and diversity. You should never get your own public IP address unless you are using your own SMTP server.

[camper]

@licquorice  Thanks  , it' s beginning to sink in. But need some further wisdom -  Given what you said however, what concerns me is if I send  email via Outlook / Ipad / Iphone - within the header is my public IP address & "name"  the specific machine I'm using . Is this regular ?  I've pasted a header below of an email I sent to my Gmail account & cc to BT account from pc  - outlook.  Then below that header is an email sent from IPAD that contains also, my actual  local /system device IP !?  .  Appreciate your thoughts.

Delivered-To: xxxxx1@gmail.com
Received: by 10.103.118.7 with SMTP id r7csp731338vsc;
        Wed, 11 Jan 2017 04:29:52 -0800 (PST)
X-Received: by 10.84.164.231 with SMTP id l36mr12994311plg.33.1484137792576;
        Wed, 11 Jan 2017 04:29:52 -0800 (PST)
Return-Path: <xxxxxxxxxas@btinternet.com>
Received: from rgout04.bt.lon5.cpcloud.co.uk (rgout0401.bt.lon5.cpcloud.co.uk. [65.20.0.214])
        by mx.google.com with ESMTP id n8si5736027pll.11.2017.01.11.04.29.52
        for <xxxxxx@gmail.com>;
        Wed, 11 Jan 2017 04:29:52 -0800 (PST)
Received-SPF: pass (google.com: domain of @xxxxx@btinternet.com designates 65.20.0.214 as permitted sender) client-ip=65.20.0.214;
Authentication-Results: mx.google.com;
       dkim=pass (test mode) header.i=@btinternet.com;
       spf=pass (google.com: domain of @xxxxx@btinternet.com designates 65.20.0.214 as permitted sender) smtp.mailfrom=xxxxxxx.com;
       dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=btinternet.com
X-OWM-Source-IP: 165.120.xxx.xxx (GB)
X-OWM-Env-Sender: @xxxx@btinternet.com
Received: from ASUS (165.120.xxx.xxx) by rgout04.bt.lon5.cpcloud.co.uk (9.0.019.13-1) (authenticated as xxxxxxxxxx)
        id 58482DA202FD1D49; Wed, 11 Jan 2017 12:29:51 +0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1484137792;
         bh=D9rDWRKrec1BsUITSwHk6FY4NmyjbEBG2CCRUj/urnY=;
        h=From:To:Subject:Date:Message-ID:MIME-Version:X-Mailer;
        b=YVm9Rd68mh/sMpx13r97x57fKwxW2VX/kKlKdzywlH8/8wjnk/woZkLZYsd/FJqL+Ysq14sW8yuxDLGzVRAo2+ePY/CRigORvWr5IE6DXyKzFJ3IdbuBBDJtaOXOvTwLgr91p+mUhblI5OdYwbG8uurnc69T1N8mzBa68YXchYI=
From: <xxxxxxbt.com>
To: <xxxxxxxx.com>, <xxxxxxxxx@btinternet.com>
Subject: outlook
Date: Wed, 11 Jan 2017 12:29:35 -0000
Message-ID: <002701d26c06$67fbe250$37f3a6f0$@btinternet.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01D26C06.67FBE250"
X-Mailer: Microsoft Outlook 15.0
Thread-Index: AdJsBl5DvdBf4oF3RtC4AVvVOAqWLw==
Content-Language: en-gb

------=_NextPart_000_0028_01D26C06.67FBE250
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit  

Email from IPAD showing specificdevice IP adress & public IP adress

X-Apparently-To: @xxxx@btinternet.com; Wed, 11 Jan 2017 12:48:24 +0000
Return-Path: xxxxxs@btinternet.com>
Received-SPF: pass (domain of btinternet.com designates 65.20.0.143 as permitted sender)
X-YMailISG: 34OWlvYWLDshGY8D6J8O9c4Z6M_ZWT0GutRk16E3Dyk09zDh
 K79OsNvzb0EG4W0gExoVpaZRscdAS5jwPKg4nQOJ7xkPpODjnFt2NxKXe2Np
 WpGlBdA6jgUMzAP4v2fShfMOyjba.6ovUBsHPUFqUMyEYxkDyZ3ZF8R8636h
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 8EolGeTNKzh2UY6xr3T4FFzXuN6IYMqCzRXDRJ1PFprr4XfOuhf4CspbA5cn
 j.kgtTMWiQ442ha2EwgLVnTeE6lOz9Gh.64Nc05EbTAw6wUQR8bbQXtBDUeW
 mlm0EwDwT1L32Uwr2JvxiQ6F5NSOq0hOQZH8IdL6DtCZ7IfEpf9yC61nTpWL
 o74yx3TMeRRl5sAVomaJSgU.ICVy0fPR_3.DlOFV.K4.OsgspNQy7RCkt5.D
 FM_1zfp5MajOA5pEm1Ljek9IzvsNLhY9GpfCapdZf8FkZdm.uG1t3zUaGuds
 MXIp57XpTQJ8H0rC63emYoeTS4pfKh4pGl.EYBXIRAaN80e1wmRiMv.uXSMg
 FV_43Td7nlPN6F3bx6TUM7cwB_63WlAb10YXnhtxjAurg7a9ksKNT.mIJHaa
 BtoSaTXsGBfxnkW_lLYHyMbOQyHquP_RX5udP4ClIArPd5VDaDAwfXux29pw
 XNfVbCVHbOPV_zQiLAQknE4__GOV3Ci8f7EPbFBsaGx2DlpMWOJDcSBsAmU4
 Nm_BOyoYYWNLg936rTBnYRyHu7PoN1jPO8GpkW16t.Ac
X-Originating-IP: [65.20.0.143]
Authentication-Results: mta1051.bt.mail.ir2.yahoo.com  from=btinternet.com; domainkeys=neutral (no sig);  from=btinternet.com; dkim=pass (ok)
Received: from 127.0.0.1  (EHLO rgout0703.bt.lon5.cpcloud.co.uk) (65.20.0.143)
  by mta1051.bt.mail.ir2.yahoo.com with SMTP; Wed, 11 Jan 2017 12:48:24 +0000
X-OWM-Source-IP: 165.120.xxx.xxx (GB)
X-OWM-Env-Sender: @xxxxxx@btinternet.com
Received: from [192.168.x.xx] (165.120.xxx.xxx) by rgout07.bt.lon5.cpcloud.co.uk (9.0.019.13-1) (authenticated as @xxxxx@btinternet.com)
        id 58482FD702F44240; Wed, 11 Jan 2017 12:48:23 +0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1484138903; 
        bh=/suxHXZ4o+aGTQdnCOObmwPgThpjZ7fQx5SVSvbcWJw=;
        h=From:Mime-Version:Subject:Message-Id:Date:To:X-Mailer;
        b=C9IZBGFBh7hJjd2E+kYIYC26129IIR+k9hSw7iTf58ApsghhL0loh+PbCJq4ImfaBkojk/HAapgBXXXG1kDxTQ2OaHIEkAcM4Lu/p0DqEZSjYT1JeNNy3T10W4CR3PvqNSausUb209i8zq3oOiHHZRLeDjEUgt6QYP1qZjocnts=
From: xxxxx <xxxxx@btinternet.com>
Content-Type: text/plain;
	charset=us-ascii
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (1.0)
Subject: iPad out 
Message-Id: <9BD7FDD3-5160-4778-887F-979B45144261@btinternet.com>
Date: Wed, 11 Jan 2017 12:48:07 +0000
To: xxxxx <xxxx@gmail.com>,
 Kelvin <xxxxx@btinternet.com>
X-Mailer: iPad Mail (13E238)
Content-Length: 50



Sent from my IPad