Overview of spam from Concentric.net

15 Feb 2006

Note: Automated spam monitoring stopped several years ago. These web pages are maintained for historical reasons. Some may be updated from time to time as news about the individual sites becomes available.

No spam today

Overview of last 14 reports

date	posts	total	BI
11 Sep 2000	579	3941	1425.58	full headers
07 Jul 2000	112	1104	350.97	full headers
19 May 2000	47	215	93.51	full headers
05 May 2000	64	209	111.19	full headers
21 Apr 2000	36	70	49.01
07 Apr 2000	19	77	33.00
14 Mar 2000	95	123	102.30
25 Feb 2000	46	432	136.66
26 Jan 2000	30	177	66.88
24 Jan 2000	42	240	91.41
12 Jan 2000	34	66	46.63
03 Jan 2000	89	127	97.53
21 Dec 1999	305	2958	860.52
17 Dec 1999	115	1707	442.76

Overview of history

	posts	total	BI
Total spam since 18 Oct 1999	3894	22816	8690.42
Peak spam on 3 Nov 1999	535	4566	1543.25
Peak daily spam on 3 Nov 1999	535	4566	1543.25
Average daily spam	11.6	68.8	26.11

full history also available

General information about Concentric.net

Concentric is a large isp with a good abuse policy but very poor enforcement -- to the point of being borderline rogue. Update: Concentric has increased its fines for spamming to $1000 per day. See their Terms Of Service

Updates on concentric abuse complaints may be obtained from http://www.concentric.net/~Nvam

Reports include spam from "Daniel Elder"'s porn site which is now hosted by Concentric after having been disconnected from Softaware.

Ownership & Contact Info
Site history

Ownership & Contact Info

Whois identifies Concentric as

Concentric Network Corporation CONCENTRIC2-DOM
   10590 N. Tantau Avenue
   Cupertino, CA 95014
   US

   Domain Name: CONCENTRIC.NET

   Administrative Contact:
      Schairer, David R. njal@CONCENTRIC.NET
      (408) 342-2800 (800) 745-2747 ext. 2800 (FAX) (408) 342-2810
   Technical Contact, Zone Contact:
      DNS & IP ADMIN hostmaster@CONCENTRIC.NET
      (408) 342-2800
      Fax- (408) 342-2810
   Billing Contact:
      Kelchner, Ray rkelchne@CONCENTRIC.NET
      408-342-2822 (FAX) 408-342-2810

   Record last updated on 13-Mar-97.
   Record created on 24-Feb-95.
   Database last updated on 2-Sep-97 05:14:00 EDT.

   Domain servers in listed order:

   NAMESERVER3.CONCENTRIC.NET   206.173.119.72
   NAMESERVER2.CONCENTRIC.NET   207.155.184.72

Site history

22 Oct 1999: Jerry Nardini has joined Concentric.
22 Oct 1999: Concentric has increased the fine for spamming to $1000.
21 Sept 1999: Tom Saylor has signed up.
6 June 1997: Concentric is experiencing a massive spam from someone single-posting ads for cable descramblers.
16 June 1997: Cable descrambler ads have stopped, however porn spam increases.
28 Aug 1997: Concentric is suing spammers for forgery. See this article at news.com.
3 Sep 1997: The cable box descrambler spammer is back. Concentric has been notified.
24 Sep 1997: The cable box descrambler spammer is back again. Concentric has been notified again.
4 May 1998: Porn spammer "Daniel Elders" has moved from Softaware to Concentric.

To report spam, contact postmaster@concentric.net

A complete history may also be available.

General notes:

Only a small subset of usenet (261 groups) was sampled. Only articles that hadn't been cancelled yet were counted. Actual spam may have been much greater.
Heuristics that detect single-posted articles are, by their very nature, somewhat shaky. Innocent articles may be tagged as spam because they share certain characteristics or keywords with actual spam. In particular, a posted spam complaint that includes the spam in its entirety will very often be identified as spam.
Some posts may be forgeries intended to look like they came from Concentric.net.
The first entry in the history file is not used to compute peak or average spam counts, as this entry covers an unknown number of days. This may cause an apparent disreprency between spam totals and spam averages.

Return to top | Return to spam summaries | complete history

The opinions expressed on this page are solely those of Ed Falk and do not necessarily represent those of any other organization, (although I hope they do). I wish to thank Rahul.net for hosting this web page.