[REN-BGP-stats] Weekly Global R&E Routing Table Report

REN Routing Table Report cscora at frr.nsrc.org
Sat Jun 5 22:00:20 UTC 2021


This is an automated weekly mailing describing the state of the Global
Research & Education Routing Table as seen from NSRC's collector.

Daily listings are sent to ren-bgp-stats-all at lists.nsrc.org.

For historical data, please see https://bgp.nsrc.org.

If you have any comments please contact Philip Smith <philip at nsrc.org>.

Global R&E Routing Table Report   22:00 GMT Sat 05 Jun, 2021

Report Website:     https://bgp.nsrc.org/REN
Detailed Analysis:  https://bgp.nsrc.org/REN/Internet2/

Analysis Summary
----------------

BGP routing table entries examined:                               22334
    Prefixes after maximum aggregation (per Origin AS):           12206
    Deaggregation factor:                                          1.83
    Unique aggregates announced (without unneeded subnets):       14404
Total ASes present in the Internet Routing Table:                  2760
    Prefixes per ASN:                                              8.09
Origin-only ASes present in the Internet Routing Table:            2357
Origin ASes announcing only one prefix:                            1083
Transit ASes present in the Internet Routing Table:                 403
Transit-only ASes present in the Internet Routing Table:             66
Average AS path length visible in the Internet Routing Table:       3.3
    Max AS path length visible:                                      15
    Max AS path prepend of ASN ( 10497)                              11
Prefixes from unregistered ASNs in the Routing Table:                16
    Number of instances of unregistered ASNs:                        16
Number of 32-bit ASNs allocated by the RIRs:                      36241
Number of 32-bit ASNs visible in the Routing Table:                 583
Prefixes from 32-bit ASNs in the Routing Table:                    1680
Number of bogon 32-bit ASNs visible in the Routing Table:             0
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:              3
Number of addresses announced to Internet:                    289143288
    Equivalent to 17 /8s, 59 /16s and 249 /24s
    Percentage of available address space announced:                7.8
    Percentage of allocated address space announced:                7.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:        3173

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                     4695
    Total APNIC prefixes after maximum aggregation:                2355
    APNIC Deaggregation factor:                                    1.99
Prefixes being announced from the APNIC address blocks:            4748
    Unique aggregates announced from the APNIC address blocks:     2751
APNIC Region origin ASes present in the Internet Routing Table:     566
    APNIC Prefixes per ASN:                                        8.39
APNIC Region origin ASes announcing only one prefix:                236
APNIC Region transit ASes present in the Internet Routing Table:     65
Average APNIC Region AS path length visible:                        3.7
    Max APNIC Region AS path length visible:                         13
Number of APNIC region 32-bit ASNs visible in the Routing Table:    210
Number of APNIC addresses announced to Internet:               47070528
    Equivalent to 2 /8s, 206 /16s and 61 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-147769
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                     11525
    Total ARIN prefixes after maximum aggregation:                 6291
    ARIN Deaggregation factor:                                     1.83
Prefixes being announced from the ARIN address blocks:            11408
    Unique aggregates announced from the ARIN address blocks:      7676
ARIN Region origin ASes present in the Internet Routing Table:     1224
    ARIN Prefixes per ASN:                                         9.32
ARIN Region origin ASes announcing only one prefix:                 433
ARIN Region transit ASes present in the Internet Routing Table:     168
Average ARIN Region AS path length visible:                         3.0
    Max ARIN Region AS path length visible:                          15
Number of ARIN region 32-bit ASNs visible in the Routing Table:     146
Number of ARIN addresses announced to Internet:               174585880
    Equivalent to 10 /8s, 103 /16s and 248 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                      3431
    Total RIPE prefixes after maximum aggregation:                 2767
    RIPE Deaggregation factor:                                     1.24
Prefixes being announced from the RIPE address blocks:             3501
    Unique aggregates announced from the RIPE address blocks:      2846
RIPE Region origin ASes present in the Internet Routing Table:      673
    RIPE Prefixes per ASN:                                         5.20
RIPE Region origin ASes announcing only one prefix:                 320
RIPE Region transit ASes present in the Internet Routing Table:     111
Average RIPE Region AS path length visible:                         3.7
    Max RIPE Region AS path length visible:                          14
Number of RIPE region 32-bit ASNs visible in the Routing Table:     126
Number of RIPE addresses announced to Internet:                59879552
    Equivalent to 3 /8s, 145 /16s and 176 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-213403
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    1477
    Total LACNIC prefixes after maximum aggregation:                592
    LACNIC Deaggregation factor:                                   2.49
Prefixes being announced from the LACNIC address blocks:           1481
    Unique aggregates announced from the LACNIC address blocks:     827
LACNIC Region origin ASes present in the Internet Routing Table:    179
    LACNIC Prefixes per ASN:                                       8.27
LACNIC Region origin ASes announcing only one prefix:                73
LACNIC Region transit ASes present in the Internet Routing Table:    28
Average LACNIC Region AS path length visible:                       4.0
    Max LACNIC Region AS path length visible:                        11
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    77
Number of LACNIC addresses announced to Internet:               4752160
    Equivalent to 0 /8s, 72 /16s and 131 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-272796 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1190
    Total AfriNIC prefixes after maximum aggregation:               186
    AfriNIC Deaggregation factor:                                  6.40
Prefixes being announced from the AfriNIC address blocks:          1193
    Unique aggregates announced from the AfriNIC address blocks:    301
AfriNIC Region origin ASes present in the Internet Routing Table:    48
    AfriNIC Prefixes per ASN:                                     24.85
AfriNIC Region origin ASes announcing only one prefix:               21
AfriNIC Region transit ASes present in the Internet Routing Table:   10
Average AfriNIC Region AS path length visible:                      3.3
    Max AfriNIC Region AS path length visible:                        7
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:   24
Number of AfriNIC addresses announced to Internet:              2850560
    Equivalent to 0 /8s, 43 /16s and 127 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         619       2155     456  UNALLOCATED
  7497         427        212      24  UNALLOCATED
  1237         191         75     137  UNALLOCATED
  7575         180        331     127  UNALLOCATED
 58647         176         18       2  UNALLOCATED
 55824         128         19      22  UNALLOCATED
  4538         123       4192      72  UNALLOCATED
  4621          82         37      11  UNALLOCATED
 23570          59          5      11  UNALLOCATED
  1659          57       1450      34  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        2393       4301     892  UNALLOCATED
 14618         485       3966     359  UNALLOCATED
  7896         245         51       7  UNALLOCATED
   376         235        180     158  UNALLOCATED
   668         211        702     182  UNALLOCATED
  8075         203      11189     182  UNALLOCATED
  5786         201         16       1  UNALLOCATED
  2152         160        507      92  UNALLOCATED
 18558         137         18       4  UNALLOCATED
     1         117          1      41  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         273       1996     235  UNALLOCATED
   786         187       1787     185  UNALLOCATED
  8895         172         24       4  UNALLOCATED
   559         116        550     107  UNALLOCATED
  1103          98       1520      85  UNALLOCATED
   137          82        677      77  UNALLOCATED
   553          72        449      72  UNALLOCATED
  2200          66        647      61  UNALLOCATED
  2614          62         32      59  UNALLOCATED
  1930          56         82      51  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         204        207      41  UNALLOCATED
 28391         152         10      66  UNALLOCATED
 11340          94         24      54  UNALLOCATED
  1251          66         37      20  UNALLOCATED
  2715          60        102      40  UNALLOCATED
 61468          45          3      15  UNALLOCATED
  4270          44         16       1  UNALLOCATED
 19611          44         17       2  UNALLOCATED
 28614          38          2       2  UNALLOCATED
 28571          37         26      15  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 36914         411         82       3  UNALLOCATED
  2018         317        319      71  UNALLOCATED
327687         136         28       3  UNALLOCATED
  2561          74          5      34  UNALLOCATED
  8094          55         48       4  UNALLOCATED
327700          39         16       1  UNALLOCATED
 37215          29          8       1  UNALLOCATED
  6879          24          2       9  UNALLOCATED
 37074          11          8       2  UNALLOCATED
 37501          11         49       6  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        2393       4301     892  UNALLOCATED
  2907         619       2155     456  UNALLOCATED
 14618         485       3966     359  UNALLOCATED
  7497         427        212      24  UNALLOCATED
 36914         411         82       3  UNALLOCATED
  2018         317        319      71  UNALLOCATED
   680         273       1996     235  UNALLOCATED
  7896         245         51       7  UNALLOCATED
   376         235        180     158  UNALLOCATED
   668         211        702     182  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
 36914         411          408  UNALLOCATED
  7497         427          403  UNALLOCATED
  2018         317          246  UNALLOCATED
  7896         245          238  UNALLOCATED
  5786         201          200  UNALLOCATED
 58647         176          174  UNALLOCATED
  8895         172          168  UNALLOCATED
  2907         619          163  UNALLOCATED
  1916         204          163  UNALLOCATED
 18558         137          133  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     36843  UNALLOCATED  64.56.80.0/23            11096  UNALLOCATED
     19658  UNALLOCATED  65.205.131.0/24          11096  UNALLOCATED
     36843  UNALLOCATED  108.59.20.0/24           11096  UNALLOCATED
     36843  UNALLOCATED  108.59.23.0/24           11096  UNALLOCATED
     36843  UNALLOCATED  131.91.183.0/24          11096  UNALLOCATED
     36843  UNALLOCATED  131.91.252.0/22          11096  UNALLOCATED
     36843  UNALLOCATED  146.201.218.0/24         11096  UNALLOCATED
     36843  UNALLOCATED  146.201.219.0/24         11096  UNALLOCATED
     22063  UNALLOCATED  153.10.0.0/16             2152  UNALLOCATED
     36843  UNALLOCATED  162.223.23.0/24          11096  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             1103  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-dsua

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
164.160.240.0/20     Origin:    328439  UNALLOCATED
                    Transit:    327992  UNALLOCATED
192.31.196.0/24      Origin:       112  UNALLOCATED
                    Transit:      1103  UNALLOCATED
192.88.99.0/24       Origin:      1103  UNALLOCATED
                    Transit:     11537  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:0        /9:1       /10:4       /11:7       /12:29      
/13:33      /14:81      /15:195     /16:2151    /17:454     /18:463     
/19:620     /20:977     /21:1026    /22:1583    /23:1686    /24:12706   
/25:86      /26:66      /27:119     /28:1       /29:46      /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 16509         664        2393  UNALLOCATED
 36914         385         411  UNALLOCATED
  8895         167         172  UNALLOCATED
 14618         158         485  UNALLOCATED
 23024          53          56  UNALLOCATED
327700          33          39  UNALLOCATED
     1          32         117  UNALLOCATED
 28614          32          38  UNALLOCATED
 25977          31          45  UNALLOCATED
263282          30          37  UNALLOCATED

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:4         3:71        4:2         5:15        6:4         8:2      
  12:1        13:217      14:84       15:10       18:41       23:22     
  24:6        31:6        37:6        38:9        40:3        41:237    
  42:25       44:5        45:64       46:10       47:1        49:10     
  50:4        52:609      54:113      58:2        59:20       60:4      
  61:4        62:7        63:34       64:126      65:6        66:52     
  67:57       68:18       69:42       70:9        71:17       72:16     
  74:39       75:128      76:166      77:7        79:10       80:13     
  81:32       82:5        83:8        84:9        85:35       86:9      
  87:1        88:2        89:11       91:54       92:1        93:12     
  94:4        95:4        96:6        97:1        98:8        99:178    
 101:2       102:9       103:303     104:43      106:1       107:8      
 108:19      109:8       110:3       111:21      112:4       114:23     
 115:1       116:5       117:63      118:35      119:18      121:29     
 122:11      123:8       124:40      125:13      128:79      129:179    
 130:120     131:105     132:56      133:137     134:92      135:1      
 136:203     137:159     138:12      139:16      140:50      141:3      
 142:61      143:38      144:69      146:126     147:70      148:167    
 149:16      150:44      151:6       152:77      153:11      154:25     
 155:51      156:64      157:30      158:48      159:118     160:33     
 161:20      162:45      163:72      164:48      165:20      166:1      
 167:17      168:161     169:9       170:93      171:1       172:9      
 173:19      174:1       175:32      176:11      177:7       178:3      
 179:13      180:21      181:11      182:6       184:9       185:53     
 186:3       187:18      188:14      189:6       190:44      191:36     
 192:1481    193:255     194:146     195:105     196:166     197:199    
 198:502     199:304     200:261     201:39      202:589     203:431    
 204:383     205:202     206:198     207:191     208:88      209:132    
 210:187     211:14      212:166     213:13      214:7       216:93     
 217:16      218:26      219:8       220:24      222:4       223:2      


End of report


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