rirtracker

IPv4 range · 1,024 addresses

208.73.4.0/22

Now

ARIN statistics
Allocated (dated 2011-03-31) (US), in the latest file
Registry
ARIN
Holder
Acoustic, L.P.
From
ARIN's latest statistics and the latest transfer record

Latest change

Transfer log Merger/acquisition or reorganization

Reported
2020-05-07 (ARIN)
Confidence
Confirmed
Inventory
No effect on ARIN applicant inventory

Timeline (5)

Every change the tracker has found, newest first. It covers ARIN from 2008-12-01, the RIPE NCC from 2010-04-23, APNIC from 2008-02-15, LACNIC from 2012-06-29 and AFRINIC from 2012-10-03.

2020-05-07 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: IBM (ARIN) to Acoustic, L.P. (ARIN)
From
IBM ARIN
To
Acoustic, L.P. ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from IBM (ARIN) to Acoustic, L.P. (ARIN) on 2020-05-07 14:19 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.

Evidence (3) · classifier 1.4.0,
  1. Transfer log Transfer log: MERGER_ACQUISITION on 2020-05-07 14:19 UTC, IBM (ARIN) to Acoustic, L.P. (ARIN); resources moved: 208.73.4.0/22 source · retrieved
  2. Before ARIN delegated statistics 2020-05-06 (produced 2020-05-06T14:00:13+00:00), before the report: assigned (dated 2011-03-31) source · retrieved
  3. After ARIN delegated statistics 2020-05-08 (produced 2020-05-08T14:00:14+00:00), after the report: assigned (dated 2011-03-31) source · retrieved
2016-08-22 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: Silverpop Systems Inc. (ARIN) to IBM (ARIN)
From
Silverpop Systems Inc. ARIN
To
IBM ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from Silverpop Systems Inc. (ARIN) to IBM (ARIN) on 2016-08-22 12:29 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.

Evidence (3) · classifier 1.4.0,
  1. Transfer log Transfer log: MERGER_ACQUISITION on 2016-08-22 12:29 UTC, Silverpop Systems Inc. (ARIN) to IBM (ARIN); resources moved: 208.73.4.0/22 source · retrieved
  2. Before ARIN delegated statistics 2016-08-21 (produced 2016-08-21T05:09:21+00:00), before the report: assigned (dated 2011-03-31) source · retrieved
  3. After ARIN delegated statistics 2016-08-23 (produced 2016-08-23T05:08:55+00:00), after the report: assigned (dated 2011-03-31) source · retrieved
2011-03-31 ARIN + Add Apparent reissuance of previously removed resource Strong inference
ARIN-Issued
Add 208.73.4.0-208.73.7.255
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it not issued on 2011-03-30 and allocated (dated 2011-03-31) on 2011-04-01. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (208.73.4.0-208.73.7.255), so it appears to have been issued again from ARIN's pool.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2011-03-31: "Add 208.73.4.0-208.73.7.255" source · retrieved
  2. Before ARIN delegated statistics 2011-03-30, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2011-04-01, after the report: allocated (dated 2011-03-31) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.0)
  2. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.1)
  3. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.2)
  4. : Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2010-12-02 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 208.73.4.0-208.73.7.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2010-12-02: "Remove 208.73.4.0-208.73.7.255" source · retrieved
  2. Before ARIN delegated statistics 2010-12-01, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-12-03, after the report: not issued source · retrieved
Classification history for this change (4 versions)
  1. : Unresolved change, observed only (classifier 1.3.0)
  2. : Unresolved change, observed only (classifier 1.3.1)
  3. : Unresolved change, observed only (classifier 1.3.2)
  4. : Unresolved change, observed only (classifier 1.4.0) current
2009-12-10 ARIN Not in ARIN-Issued Removed (return, revocation or reclamation not publicly distinguishable) Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2010-02-08. Possible reissue candidate after this date; not confirmed available.

Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2006-11-30) on 2009-12-09 and not issued on 2009-12-11. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2010-02-08. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 208.73.4.0/22 assigned on 2009-12-10, not listed on 2009-12-11 source · retrieved
  2. Before ARIN delegated statistics 2009-12-09, before the report: assigned (dated 2006-11-30) source · retrieved
  3. After ARIN delegated statistics 2009-12-11, after the report: not issued source · retrieved
Classification history for this change (4 versions)
  1. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
  2. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
  3. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
  4. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current

Transfer records (2)

Date (UTC)LogTypeRange movedFromTo
ARINMerger acquisition208.73.4.0/22 IBM ARINAcoustic, L.P. ARIN
ARINMerger acquisition208.73.4.0/22 Silverpop Systems Inc. ARINIBM ARIN

Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (ARIN's from 2009, the RIPE NCC's from 2012, APNIC's from 2010, LACNIC's from 2016, AFRINIC's from 2018). A transfer between two registries is in both logs.

RDAP lookups

Not looked up. The tracker queries RDAP for changes as they're reported (on first sight, after 24 hours and after seven days); older changes aren't looked up because today's RDAP says nothing about the past.

This page as data: ip/208.73.4.0-208.73.7.255.json