IPv4 Transfers August 2021

In August 2021, the five Regional Internet Registries recorded 913 transfers: 4,766,976 IPv4 addresses in 706 blocks, plus 103 IPv6 blocks and 104 AS numbers. 38 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.

IPv4 addresses transferred
4.8M
706 IPv4 blocks
Registry transfers
913
103 IPv6 / 104 ASN
Inter-RIR transfers
38
153K IPv4 addresses (3%)
Mergers and acquisitions
241
672 market transfers

Transfer Volume by RIR

Transfers counted at the receiving registry. Inter-RIR columns show IPv4 that entered or left the region.

Transfers per Regional Internet Registry, August 2021
RegistryTransfersIPv4 receivedInter-RIR inInter-RIR out
RIPE NCC6422,851,328120,83219,712
APNIC811,101,31217,92014,080
ARIN149537,60013,824110,592
AFRINIC30252,160--
LACNIC1124,576-8,192

Inter-RIR Transfers August 2021

IPv4 addresses moved from one registry to another. All inter-RIR transfers

IPv4 addresses transferred between Regional Internet Registries
From ↓ / To →RIPE NCCARINAPNICLACNICAFRINIC
RIPE NCC-
2,816
6 transfers
17K
6 transfers
00
ARIN
110K
6 transfers
-
1,024
1 transfers
00
APNIC
7,168
7 transfers
6,912
10 transfers
-00
LACNIC
4,096
1 transfers
4,096
1 transfers
0-0
AFRINIC0000-

IPv4 Transfers by Block Size

Number of transferred IPv4 blocks per prefix length.

IPv4 transfers by prefix length, August 2021
Prefix lengthAddresses per blockBlocksShare of blocksIPv4 addresses
/14262,14430.4%786,432
/15131,07271.0%917,504
/1665,536253.5%1,638,400
/1732,768101.4%327,680
/1816,384121.7%196,608
/198,192324.5%262,144
/204,096375.2%151,552
/212,048385.4%77,824
/221,02432546.0%332,800
/235128011.3%40,960
/2425613719.4%35,072

Top Receiving Countries

  1. 1🇲🇺 Mauritius79K
  2. 2🇦🇼 Aruba16K
  3. 3🇺🇸 United States12K
  4. 4🇨🇦 Canada8,448
  5. 5🇱🇰 Sri Lanka8,192
  6. 6🇭🇰 Hong Kong SAR China8,192
  7. 7🇸🇬 Singapore5,120
  8. 8🇪🇪 Estonia4,096
  9. 9🇲🇽 Mexico2,048

Top Source Countries

  1. 1🇿🇦 South Africa79K
  2. 2🇮🇳 India18K
  3. 3🇦🇷 Argentina16K
  4. 4🇺🇸 United States9,472
  5. 5🇧🇿 Belize4,096
  6. 6🇧🇷 Brazil4,096
  7. 7🇨🇳 China3,072
  8. 8🇦🇺 Australia2,048
  9. 9🇧🇩 Bangladesh2,048

IPv4 transferred across country borders in August 2021. Registry logs before mid-2025 do not carry a country for every transfer, so this ranking undercounts some regions.

Largest IPv4 Transfers August 2021